BogaudioModules

commit 276f6774b700ffe97c0a6257535a823266312947
parent b7a1696d7c771508ed8c5bb347412785321c7791
Author: Matt Demanett <matt@demanett.net>
Date:   Sat, 28 Mar 2020 21:49:03 -0400

MIX4X/MIX8X: EQ and send expanders for MIX4/8.

Diffstat:
M
plugin.json
 | 
18
++++++++++++++++++
A
res-src/Mix4x-src.svg
 | 
260
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
res-src/Mix8x-src.svg
 | 
374
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
res/Mix4x.svg
 | 
0

A
res/Mix8x.svg
 | 
0

M
src/FFB.hpp
 | 
28
++++++++++++++--------------
M
src/FMOp.hpp
 | 
2
+-
M
src/Mix1.cpp
 | 
4
+---
M
src/Mix4.cpp
 | 
240
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
M
src/Mix4.hpp
 | 
131
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
M
src/Mix8.cpp
 | 
312
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
M
src/Mix8.hpp
 | 
207
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
M
src/Mono.hpp
 | 
2
+-
M
src/Pan.cpp
 | 
5
+++--
M
src/TestExpander.hpp
 | 
3
+--
M
src/VCA.hpp
 | 
2
+-
M
src/VCM.hpp
 | 
2
+-
M
src/bogaudio.cpp
 | 
2
++
M
src/expanders.hpp
 | 
8
++++----
M
src/mixer.cpp
 | 
54
+++++++++++++++++++++++++++++++++++++++++++-----------
M
src/mixer.hpp
 | 
77
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------
M
src/param_quantities.cpp
 | 
8
++++----
M
src/param_quantities.hpp
 | 
2
+-

23 files changed, 1644 insertions(+), 97 deletions(-)
diff --git a/plugin.json b/plugin.json
@@ -279,6 +279,15 @@
       ]
     },
     {
+      "slug": "Bogaudio-Mix8x",
+      "name": "MIX8X",
+      "description": "Expander for MIX8, adds EQs and sends",
+      "tags": [
+        "Mixer",
+        "Expander"
+      ]
+    },
+    {
       "slug": "Bogaudio-Mix4",
       "name": "MIX4",
       "description": "4-channel mixer and panner",
@@ -288,6 +297,15 @@
       ]
     },
     {
+      "slug": "Bogaudio-Mix4x",
+      "name": "MIX4X",
+      "description": "Expander for MIX4, adds EQs and sends",
+      "tags": [
+        "Mixer",
+        "Expander"
+      ]
+    },
+    {
       "slug": "Bogaudio-Mix1",
       "name": "MIX1",
       "description": "Fader/amplifier with CV controllable mute",
diff --git a/res-src/Mix4x-src.svg b/res-src/Mix4x-src.svg
@@ -0,0 +1,260 @@
+<svg
+  version="1.1"
+  xmlns="http://www.w3.org/2000/svg"
+  xmlns:xlink="http://www.w3.org/1999/xlink"
+  width="225"
+  height="380"
+  viewBox="0 0 225 380"
+>
+  <style>
+    text {
+      fill: #333;
+      font-family: 'Roboto', sans-serif;
+      font-weight: bold;
+    }
+    text.title {
+      font-family: 'Comfortaa', sans-serif;
+      font-weight: normal;
+    }
+    text.brand {
+      font-family: 'Audiowide', sans-serif;
+      font-weight: bold;
+    }
+  </style>
+
+  <defs>
+    <symbol id="knob-smallest" viewBox="0 0 16px 16px">
+      <g transform="translate(8 8)">
+        <polyline points="-3,0 3,0" stroke-width="1" stroke="#00f" />
+        <polyline points="0,-3 0,3" stroke-width="1" stroke="#00f" />
+        <circle r="7.5" stroke-width="1" stroke="#00f" fill="none" />
+      </g>
+    </symbol>
+
+    <symbol id="knobguide-centertick" viewBox="0 0 40px 40px">
+      <g transform="translate(20 20)">
+        <g transform="rotate(-90) translate(10 0)">
+          <polyline points="0,0 4,0" stroke-width="1" stroke="#333" />
+        </g>
+        <path d="M 0 -12.5 A 12.5 12.5 0 0 1 12.5 0" stroke="#333" stroke-width="0.5" stroke-linecap="round" fill="none" transform="rotate(20)" />
+        <path d="M 0 -12.5 A 12.5 12.5 0 0 1 12.5 0" stroke="#333" stroke-width="0.5" stroke-linecap="round" fill="none" transform="rotate(43)" />
+        <path d="M 0 -12.5 A 12.5 12.5 0 0 0 -12.5 0" stroke="#333" stroke-width="0.5" stroke-linecap="round" fill="none" transform="rotate(-20)" />
+        <path d="M 0 -12.5 A 12.5 12.5 0 0 0 -12.5 0" stroke="#333" stroke-width="0.5" stroke-linecap="round" fill="none" transform="rotate(-43)" />
+      </g>
+    </symbol>
+
+    <symbol id="knobguide-maxtick" viewBox="0 0 40px 40px">
+      <g transform="translate(20 20)">
+        <g transform="rotate(60) translate(10 0)">
+          <polyline points="0,0 4,0" stroke-width="1" stroke="#333" />
+        </g>
+        <path d="M 0 -12.5 A 12.5 12.5 0 0 1 12.5 0" stroke="#333" stroke-width="0.5" stroke-linecap="round" fill="none" transform="rotate(0)" />
+        <path d="M 0 -12.5 A 12.5 12.5 0 0 1 12.5 0" stroke="#333" stroke-width="0.5" stroke-linecap="round" fill="none" transform="rotate(43)" />
+        <path d="M 0 -12.5 A 12.5 12.5 0 0 0 -12.5 0" stroke="#333" stroke-width="0.5" stroke-linecap="round" fill="none" transform="rotate(0)" />
+        <path d="M 0 -12.5 A 12.5 12.5 0 0 0 -12.5 0" stroke="#333" stroke-width="0.5" stroke-linecap="round" fill="none" transform="rotate(-43)" />
+      </g>
+    </symbol>
+
+    <symbol id="input" viewBox="0 0 24px 24px">
+      <g transform="translate(12 12)">
+        <circle cx="0" cy="0" r="5" stroke-width="1" stroke="#0f0" fill="#0f0" />
+        <circle cx="0" cy="0" r="10.5" stroke-width="3" stroke="#0f0" fill="none" />
+      </g>
+    </symbol>
+
+    <symbol id="output" viewBox="0 0 24px 24px">
+      <g transform="translate(12 12)">
+        <circle cx="0" cy="0" r="5" stroke-width="1" stroke="#f00" fill="#f00" />
+        <circle cx="0" cy="0" r="10.5" stroke-width="3" stroke="#f00" fill="none" />
+      </g>
+    </symbol>
+
+    <symbol id="button-small" viewBox="0 0 9px 9px">
+      <g transform="translate(4.5 4.5)">
+        <circle r="4" stroke-width="1" stroke="#00f" fill="#f00" />
+      </g>
+    </symbol>
+
+    <symbol id="light-tiny" viewBox="0 0 1.1px 1.1px">
+      <rect width="3.2" height="3.2" fill="#0f0" />
+    </symbol>
+  </defs>
+
+  <rect width="100%" height="100%" fill="#ddd" />
+  <polyline points="1,1 224,1 224,379 1,379 1,1" stroke="#e4e4e4" stroke-width="0.5" fill="none" />
+  <polyline points="0.5,0.5 224.5,0.5 224.5,379.5 0.5,379.5 0.5,0.5" stroke="#ebebeb" stroke-width="0.8" fill="none" />
+  <polyline points="0,0 225,0 225,380 0,380 0,0" stroke="#f2f2f2" stroke-width="1" fill="none" />
+
+  <!-- <rect width="75" height="20" fill="#0f0" transform="translate(0 0)" /> -->
+  <!-- <rect width="75" height="20" fill="#0f0" transform="translate(150 0)" /> -->
+  <!-- <polyline points="0,0 0,380" stroke="#0f0" stroke-width="1" fill="none" transform="translate(10 0)" /> -->
+  <!-- <polyline points="0,0 0,380" stroke="#0f0" stroke-width="1" fill="none" transform="translate(215 0)" /> -->
+  <!-- <polyline points="0,0 225,0" stroke="#0f0" stroke-width="1" fill="none" transform="translate(0 360)" /> -->
+
+  <text class="title" x="77" y="19" font-size="12pt" letter-spacing="4px">MIX4X</text>
+  <g transform="translate(72.5 374)">
+    <text class="brand" font-size="8pt" letter-spacing="2px">BOGAUDIO</text>
+    <rect width="3.0" height="3" fill="#ddd" transform="translate(24 -5)" />
+  </g>
+
+  <g transform="translate(4 20)">
+    <text font-size="5pt" letter-spacing="2px" transform="translate(13.7 9)">CH1</text>
+    <use id="LOW1_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 23)" />
+    <use xlink:href="#knobguide-centertick" transform="translate(2.5 11)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(14 48)">LOW</text>
+    <use id="MID1_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 69)" />
+    <use xlink:href="#knobguide-centertick" transform="translate(2.5 57)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(14 94)">MID</text>
+    <use id="HIGH1_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 115)" />
+    <use xlink:href="#knobguide-centertick" transform="translate(2.5 103)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(11.5 140)">HIGH</text>
+    <use id="A1_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 160)" />
+    <use xlink:href="#knobguide-maxtick" transform="translate(2.5 148)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(20.2 185)">A</text>
+    <text font-size="5pt" letter-spacing="1px" transform="translate(9 195)">PRE</text>
+    <use id="PRE_A1_PARAM" xlink:href="#button-small" transform="translate(26 188)" />
+    <use id="B1_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 216)" />
+    <use xlink:href="#knobguide-maxtick" transform="translate(2.5 204)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(20.4 241)">B</text>
+    <text font-size="5pt" letter-spacing="1px" transform="translate(9 251)">PRE</text>
+    <use id="PRE_B1_PARAM" xlink:href="#button-small" transform="translate(26 244)" />
+    <g transform="translate(5.5 267)">
+      <rect width="34" height="73" rx="5" fill="#fafafa" />
+      <use id="A1_INPUT" xlink:href="#input" transform="translate(5 3)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(6 35)">CV-A</text>
+      <use id="B1_INPUT" xlink:href="#input" transform="translate(5 38)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(6 70)">CV-B</text>
+    </g>
+  </g>
+
+  <g transform="translate(47 20)">
+    <text font-size="5pt" letter-spacing="2px" transform="translate(13.7 9)">CH2</text>
+    <use id="LOW2_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 23)" />
+    <use xlink:href="#knobguide-centertick" transform="translate(2.5 11)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(14 48)">LOW</text>
+    <use id="MID2_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 69)" />
+    <use xlink:href="#knobguide-centertick" transform="translate(2.5 57)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(14 94)">MID</text>
+    <use id="HIGH2_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 115)" />
+    <use xlink:href="#knobguide-centertick" transform="translate(2.5 103)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(11.5 140)">HIGH</text>
+    <use id="A2_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 160)" />
+    <use xlink:href="#knobguide-maxtick" transform="translate(2.5 148)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(20.2 185)">A</text>
+    <text font-size="5pt" letter-spacing="1px" transform="translate(9 195)">PRE</text>
+    <use id="PRE_A2_PARAM" xlink:href="#button-small" transform="translate(26 188)" />
+    <use id="B2_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 216)" />
+    <use xlink:href="#knobguide-maxtick" transform="translate(2.5 204)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(20.4 241)">B</text>
+    <text font-size="5pt" letter-spacing="1px" transform="translate(9 251)">PRE</text>
+    <use id="PRE_B2_PARAM" xlink:href="#button-small" transform="translate(26 244)" />
+    <g transform="translate(5.5 267)">
+      <rect width="34" height="73" rx="5" fill="#fafafa" />
+      <use id="A2_INPUT" xlink:href="#input" transform="translate(5 3)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(6 35)">CV-A</text>
+      <use id="B2_INPUT" xlink:href="#input" transform="translate(5 38)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(6 70)">CV-B</text>
+    </g>
+  </g>
+
+  <g transform="translate(90 20)">
+    <text font-size="5pt" letter-spacing="2px" transform="translate(13.7 9)">CH3</text>
+    <use id="LOW3_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 23)" />
+    <use xlink:href="#knobguide-centertick" transform="translate(2.5 11)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(14 48)">LOW</text>
+    <use id="MID3_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 69)" />
+    <use xlink:href="#knobguide-centertick" transform="translate(2.5 57)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(14 94)">MID</text>
+    <use id="HIGH3_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 115)" />
+    <use xlink:href="#knobguide-centertick" transform="translate(2.5 103)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(11.5 140)">HIGH</text>
+    <use id="A3_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 160)" />
+    <use xlink:href="#knobguide-maxtick" transform="translate(2.5 148)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(20.2 185)">A</text>
+    <text font-size="5pt" letter-spacing="1px" transform="translate(9 195)">PRE</text>
+    <use id="PRE_A3_PARAM" xlink:href="#button-small" transform="translate(26 188)" />
+    <use id="B3_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 216)" />
+    <use xlink:href="#knobguide-maxtick" transform="translate(2.5 204)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(20.4 241)">B</text>
+    <text font-size="5pt" letter-spacing="1px" transform="translate(9 251)">PRE</text>
+    <use id="PRE_B3_PARAM" xlink:href="#button-small" transform="translate(26 244)" />
+    <g transform="translate(5.5 267)">
+      <rect width="34" height="73" rx="5" fill="#fafafa" />
+      <use id="A3_INPUT" xlink:href="#input" transform="translate(5 3)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(6 35)">CV-A</text>
+      <use id="B3_INPUT" xlink:href="#input" transform="translate(5 38)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(6 70)">CV-B</text>
+    </g>
+  </g>
+
+  <g transform="translate(133 20)">
+    <text font-size="5pt" letter-spacing="2px" transform="translate(13.7 9)">CH4</text>
+    <use id="LOW4_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 23)" />
+    <use xlink:href="#knobguide-centertick" transform="translate(2.5 11)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(14 48)">LOW</text>
+    <use id="MID4_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 69)" />
+    <use xlink:href="#knobguide-centertick" transform="translate(2.5 57)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(14 94)">MID</text>
+    <use id="HIGH4_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 115)" />
+    <use xlink:href="#knobguide-centertick" transform="translate(2.5 103)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(11.5 140)">HIGH</text>
+    <use id="A4_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 160)" />
+    <use xlink:href="#knobguide-maxtick" transform="translate(2.5 148)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(20.2 185)">A</text>
+    <text font-size="5pt" letter-spacing="1px" transform="translate(9 195)">PRE</text>
+    <use id="PRE_A4_PARAM" xlink:href="#button-small" transform="translate(26 188)" />
+    <use id="B4_PARAM" xlink:href="#knob-smallest" transform="translate(14.5 216)" />
+    <use xlink:href="#knobguide-maxtick" transform="translate(2.5 204)" />
+    <text font-size="5pt" letter-spacing="2px" transform="translate(20.4 241)">B</text>
+    <text font-size="5pt" letter-spacing="1px" transform="translate(9 251)">PRE</text>
+    <use id="PRE_B4_PARAM" xlink:href="#button-small" transform="translate(26 244)" />
+    <g transform="translate(5.5 267)">
+      <rect width="34" height="73" rx="5" fill="#fafafa" />
+      <use id="A4_INPUT" xlink:href="#input" transform="translate(5 3)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(6 35)">CV-A</text>
+      <use id="B4_INPUT" xlink:href="#input" transform="translate(5 38)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(6 70)">CV-B</text>
+    </g>
+  </g>
+
+  <g transform="translate(176 20)">
+    <!-- <rect width="39" height="344" fill="#ccc" transform="translate(3 0)" /> -->
+    <g transform="translate(5.5 1)">
+      <rect width="34" height="50" rx="5" fill="#bbb" />
+      <use id="SEND_A_OUTPUT" xlink:href="#output" transform="translate(5 3)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(14.7 35)">A</text>
+      <rect width="34" height="146" rx="5" fill="#fafafa" transform="translate(0 38)" />
+      <rect width="34" height="5" fill="#fafafa" transform="translate(0 38)" />
+      <use id="L_A_INPUT" xlink:href="#input" transform="translate(5 41)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(15.3 73)">L</text>
+      <use id="R_A_INPUT" xlink:href="#input" transform="translate(5 76)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(8 108)">R(L)</text>
+      <use id="LEVEL_A_PARAM" xlink:href="#knob-smallest" transform="translate(9 117)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(3.5 145)">LEVEL</text>
+      <use id="LEVEL_A_INPUT" xlink:href="#input" transform="translate(5 149)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(11 181)">CV</text>
+      <!-- <g transform="translate(0 29.5)"> -->
+        <!-- <rect width="9" height="36" rx="5" fill="#fafafa" transform="translate(-9 8.5)" /> -->
+        <!-- <rect width="4" height="36" fill="#fafafa" transform="translate(-4 8.5)" /> -->
+        <!-- <text font-size="5pt" letter-spacing="2px" transform="translate(-1 40) rotate(-90)">AUX A</text> -->
+      <!-- </g> -->
+    </g>
+    <use xlink:href="#knobguide-maxtick" transform="translate(2.5 106)" />
+
+    <g transform="translate(5.5 191)">
+      <rect width="34" height="50" rx="5" fill="#bbb" />
+      <use id="SEND_B_OUTPUT" xlink:href="#output" transform="translate(5 3)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(14.8 35)">B</text>
+      <rect width="34" height="111" rx="5" fill="#fafafa" transform="translate(0 38)" />
+      <rect width="34" height="5" fill="#fafafa" transform="translate(0 38)" />
+      <use id="L_B_INPUT" xlink:href="#input" transform="translate(5 41)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(15.3 73)">L</text>
+      <use id="R_B_INPUT" xlink:href="#input" transform="translate(5 76)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(8 108)">R(L)</text>
+      <use id="LEVEL_B_PARAM" xlink:href="#knob-smallest" transform="translate(9 117)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(3.5 145)">LEVEL</text>
+    </g>
+    <use xlink:href="#knobguide-maxtick" transform="translate(2.5 296)" />
+    <!-- <polyline points="0,0 0,350" stroke="#0f0" stroke-width="1" fill="none" transform="translate(22.5 0)" /> -->
+  </g>
+</svg>
diff --git a/res-src/Mix8x-src.svg b/res-src/Mix8x-src.svg
@@ -0,0 +1,374 @@
+<svg
+  version="1.1"
+  xmlns="http://www.w3.org/2000/svg"
+  xmlns:xlink="http://www.w3.org/1999/xlink"
+  width="405"
+  height="380"
+  viewBox="0 0 405 380"
+>
+  <style>
+    text {
+      fill: #333;
+      font-family: 'Roboto', sans-serif;
+      font-weight: bold;
+    }
+    text.title {
+      font-family: 'Comfortaa', sans-serif;
+      font-weight: normal;
+    }
+    text.brand {
+      font-family: 'Audiowide', sans-serif;
+      font-weight: bold;
+    }
+  </style>
+
+  <defs>
+    <symbol id="knob-smallest" viewBox="0 0 16px 16px">
+      <g transform="translate(8 8)">
+        <polyline points="-3,0 3,0" stroke-width="1" stroke="#00f" />
+        <polyline points="0,-3 0,3" stroke-width="1" stroke="#00f" />
+        <circle r="7.5" stroke-width="1" stroke="#00f" fill="none" />
+      </g>
+    </symbol>
+
+    <symbol id="knobguide-centertick" viewBox="0 0 40px 40px">
+      <g transform="translate(20 20)">
+        <g transform="rotate(-90) translate(10 0)">
+          <polyline points="0,0 4,0" stroke-width="1" stroke="#333" />
+        </g>
+        <path d="M 0 -12.5 A 12.5 12.5 0 0 1 12.5 0" stroke="#333" stroke-width="0.5" stroke-linecap="round" fill="none" transform="rotate(20)" />
+        <path d="M 0 -12.5 A 12.5 12.5 0 0 1 12.5 0" stroke="#333" stroke-width="0.5" stroke-linecap="round" fill="none" transform="rotate(43)" />
+        <path d="M 0 -12.5 A 12.5 12.5 0 0 0 -12.5 0" stroke="#333" stroke-width="0.5" stroke-linecap="round" fill="none" transform="rotate(-20)" />
+        <path d="M 0 -12.5 A 12.5 12.5 0 0 0 -12.5 0" stroke="#333" stroke-width="0.5" stroke-linecap="round" fill="none" transform="rotate(-43)" />
+      </g>
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+      <use id="R_A_INPUT" xlink:href="#input" transform="translate(5 76)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(8 108)">R(L)</text>
+      <use id="LEVEL_A_PARAM" xlink:href="#knob-smallest" transform="translate(9 117)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(3.5 145)">LEVEL</text>
+      <use id="LEVEL_A_INPUT" xlink:href="#input" transform="translate(5 149)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(11 181)">CV</text>
+    </g>
+    <use xlink:href="#knobguide-maxtick" transform="translate(2.5 106)" />
+
+    <g transform="translate(5.5 191)">
+      <rect width="34" height="50" rx="5" fill="#bbb" />
+      <use id="SEND_B_OUTPUT" xlink:href="#output" transform="translate(5 3)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(14.8 35)">B</text>
+      <rect width="34" height="111" rx="5" fill="#fafafa" transform="translate(0 38)" />
+      <rect width="34" height="5" fill="#fafafa" transform="translate(0 38)" />
+      <use id="L_B_INPUT" xlink:href="#input" transform="translate(5 41)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(15.3 73)">L</text>
+      <use id="R_B_INPUT" xlink:href="#input" transform="translate(5 76)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(8 108)">R(L)</text>
+      <use id="LEVEL_B_PARAM" xlink:href="#knob-smallest" transform="translate(9 117)" />
+      <text font-size="5pt" letter-spacing="2px" transform="translate(3.5 145)">LEVEL</text>
+    </g>
+    <use xlink:href="#knobguide-maxtick" transform="translate(2.5 296)" />
+    <!-- <polyline points="0,0 0,350" stroke="#0f0" stroke-width="1" fill="none" transform="translate(22.5 0)" /> -->
+  </g>
+</svg>
diff --git a/res/Mix4x.svg b/res/Mix4x.svg
Binary files differ.
diff --git a/res/Mix8x.svg b/res/Mix8x.svg
Binary files differ.
diff --git a/src/FFB.hpp b/src/FFB.hpp
@@ -64,21 +64,21 @@ struct FFB : BGModule {
 
 	FFB() {
 		config(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS, NUM_LIGHTS);
-		configParam<AmpliferParamQuantity>(BAND_1_PARAM, 0.0f, 1.0f, 1.0f, "Band 1 level");
-		configParam<AmpliferParamQuantity>(BAND_5_PARAM, 0.0f, 1.0f, 1.0f, "Band 5 level");
-		configParam<AmpliferParamQuantity>(BAND_9_PARAM, 0.0f, 1.0f, 1.0f, "Band 9 level");
-		configParam<AmpliferParamQuantity>(BAND_2_PARAM, 0.0f, 1.0f, 1.0f, "Band 2 level");
-		configParam<AmpliferParamQuantity>(BAND_6_PARAM, 0.0f, 1.0f, 1.0f, "Band 6 level");
-		configParam<AmpliferParamQuantity>(BAND_10_PARAM, 0.0f, 1.0f, 1.0f, "Band 10 level");
-		configParam<AmpliferParamQuantity>(BAND_3_PARAM, 0.0f, 1.0f, 1.0f, "Band 3 level");
-		configParam<AmpliferParamQuantity>(BAND_7_PARAM, 0.0f, 1.0f, 1.0f, "Band 7 level");
-		configParam<AmpliferParamQuantity>(BAND_11_PARAM, 0.0f, 1.0f, 1.0f, "Band 11 level");
-		configParam<AmpliferParamQuantity>(BAND_4_PARAM, 0.0f, 1.0f, 1.0f, "Band 4 level");
-		configParam<AmpliferParamQuantity>(BAND_8_PARAM, 0.0f, 1.0f, 1.0f, "Band 8 level");
-		configParam<AmpliferParamQuantity>(BAND_12_PARAM, 0.0f, 1.0f, 1.0f, "Band 12 level");
-		configParam<AmpliferParamQuantity>(LOWPASS_PARAM, 0.0f, 1.0f, 1.0f, "Lowpass level");
+		configParam<AmplifierParamQuantity>(BAND_1_PARAM, 0.0f, 1.0f, 1.0f, "Band 1 level");
+		configParam<AmplifierParamQuantity>(BAND_5_PARAM, 0.0f, 1.0f, 1.0f, "Band 5 level");
+		configParam<AmplifierParamQuantity>(BAND_9_PARAM, 0.0f, 1.0f, 1.0f, "Band 9 level");
+		configParam<AmplifierParamQuantity>(BAND_2_PARAM, 0.0f, 1.0f, 1.0f, "Band 2 level");
+		configParam<AmplifierParamQuantity>(BAND_6_PARAM, 0.0f, 1.0f, 1.0f, "Band 6 level");
+		configParam<AmplifierParamQuantity>(BAND_10_PARAM, 0.0f, 1.0f, 1.0f, "Band 10 level");
+		configParam<AmplifierParamQuantity>(BAND_3_PARAM, 0.0f, 1.0f, 1.0f, "Band 3 level");
+		configParam<AmplifierParamQuantity>(BAND_7_PARAM, 0.0f, 1.0f, 1.0f, "Band 7 level");
+		configParam<AmplifierParamQuantity>(BAND_11_PARAM, 0.0f, 1.0f, 1.0f, "Band 11 level");
+		configParam<AmplifierParamQuantity>(BAND_4_PARAM, 0.0f, 1.0f, 1.0f, "Band 4 level");
+		configParam<AmplifierParamQuantity>(BAND_8_PARAM, 0.0f, 1.0f, 1.0f, "Band 8 level");
+		configParam<AmplifierParamQuantity>(BAND_12_PARAM, 0.0f, 1.0f, 1.0f, "Band 12 level");
+		configParam<AmplifierParamQuantity>(LOWPASS_PARAM, 0.0f, 1.0f, 1.0f, "Lowpass level");
 		configParam(CV_PARAM, 0.0f, 1.0f, 1.0f, "Level CV", "%", 0.0f, 100.0f);
-		configParam<AmpliferParamQuantity>(HIGHPASS_PARAM, 0.0f, 1.0f, 1.0f, "Highpass level");
+		configParam<AmplifierParamQuantity>(HIGHPASS_PARAM, 0.0f, 1.0f, 1.0f, "Highpass level");
 	}
 
 	void sampleRateChange() override;
diff --git a/src/FMOp.hpp b/src/FMOp.hpp
@@ -98,7 +98,7 @@ struct FMOp : BGModule {
 		void setDisplayValue(float v) override;
 	};
 
-	struct LevelParamQuantity : AmpliferParamQuantity {
+	struct LevelParamQuantity : AmplifierParamQuantity {
 		bool isLinear() override;
 	};
 
diff --git a/src/Mix1.cpp b/src/Mix1.cpp
@@ -19,10 +19,8 @@ int Mix1::channels() {
 void Mix1::addChannel(int c) {
 	_engines[c] = new MixerChannel(
 		params[LEVEL_PARAM],
-		params[LEVEL_PARAM], // not used
 		params[MUTE_PARAM],
 		inputs[LEVEL_INPUT],
-		inputs[LEVEL_INPUT], // not used
 		1000.0f,
 		&inputs[MUTE_INPUT]
 	);
@@ -40,7 +38,7 @@ void Mix1::processAlways(const ProcessArgs& args) {
 
 void Mix1::processChannel(const ProcessArgs& args, int c) {
 	MixerChannel& e = *_engines[c];
-	e.next(inputs[IN_INPUT].getVoltage(c), false, false, c);
+	e.next(inputs[IN_INPUT].getVoltage(c), false, c);
 	_rmsSum += e.rms;
 	outputs[OUT_OUTPUT].setChannels(_channels);
 	outputs[OUT_OUTPUT].setVoltage(e.out, c);
diff --git a/src/Mix4.cpp b/src/Mix4.cpp
@@ -20,13 +20,20 @@ void Mix4::sampleRateChange() {
 	float sr = APP->engine->getSampleRate();
 	for (int i = 0; i < 4; ++i) {
 		_channels[i]->setSampleRate(sr);
+		_panSLs[i].setParams(sr, MIXER_PAN_SLEW_MS, 2.0f);
 	}
 	_slewLimiter.setParams(sr, MixerChannel::levelSlewTimeMS, MixerChannel::maxDecibels - MixerChannel::minDecibels);
 	_rms.setSampleRate(sr);
 }
 
-void Mix4::processChannel(const ProcessArgs& args, int _c) {
-	bool stereo = outputs[L_OUTPUT].isConnected() && outputs[R_OUTPUT].isConnected();
+void Mix4::processAll(const ProcessArgs& args) {
+	Mix4ExpanderMessage* toExp = &_dummyExpanderMessage;
+	Mix4ExpanderMessage* fromExp = &_dummyExpanderMessage;
+	if (connected()) {
+		toExp = toExpander();
+		fromExp = fromExpander();
+	}
+
 	bool solo =
 		params[MUTE1_PARAM].getValue() > 1.5f ||
 		params[MUTE2_PARAM].getValue() > 1.5f ||
@@ -40,7 +47,8 @@ void Mix4::processChannel(const ProcessArgs& args, int _c) {
 		} else {
 			sample = inputs[IN1_INPUT].getVoltageSum();
 		}
-		_channels[0]->next(sample, stereo, solo);
+		_channels[0]->next(sample, solo);
+		toExp->preFader[0] = sample;
 
 		for (int i = 1; i < 4; ++i) {
 			float sample = 0.0f;
@@ -50,7 +58,8 @@ void Mix4::processChannel(const ProcessArgs& args, int _c) {
 			else if (_polyChannelOffset >= 0) {
 				sample = inputs[IN1_INPUT].getPolyVoltage(_polyChannelOffset + i);
 			}
-			_channels[i]->next(sample, stereo, solo);
+			_channels[i]->next(sample, solo);
+			toExp->preFader[i] = sample;
 		}
 	}
 
@@ -65,27 +74,45 @@ void Mix4::processChannel(const ProcessArgs& args, int _c) {
 	}
 	_amplifier.setLevel(_slewLimiter.next(level));
 
+	float outs[4];
+	for (int i = 0; i < 4; ++i) {
+		toExp->postFader[i] = outs[i] = _channels[i]->out;
+	}
+
 	float mono = 0.0f;
+	float left = 0.0f;
+	float right = 0.0f;
+	if (connected()) {
+		mono += fromExp->returnA[0] + fromExp->returnB[0];
+		left += fromExp->returnA[0] + fromExp->returnB[0];
+		right += fromExp->returnA[1] + fromExp->returnB[1];
+		std::copy(fromExp->postEQ, fromExp->postEQ + 4, outs);
+	}
+
 	for (int i = 0; i < 4; ++i) {
-		mono += _channels[i]->out;
+		mono += outs[i];
 	}
 	mono = _amplifier.next(mono);
 	mono = _saturator.next(mono);
 	_rmsLevel = _rms.next(mono) / 5.0f;
 
-	if (stereo) {
-		float left = 0.0f;
+	if (outputs[L_OUTPUT].isConnected() && outputs[R_OUTPUT].isConnected()) {
 		for (int i = 0; i < 4; ++i) {
-			left += _channels[i]->left;
+			float pan = clamp(params[PAN1_PARAM + 3 * i].getValue(), -1.0f, 1.0f);
+			if (inputs[PAN1_INPUT + 3 * i].isConnected()) {
+				pan *= clamp(inputs[PAN1_INPUT + 3 * i].getVoltage() / 5.0f, -1.0f, 1.0f);
+			}
+			_panners[i].setPan(_panSLs[i].next(pan));
+			float l, r;
+			_panners[i].next(outs[i], l, r);
+			left += l;
+			right += r;
 		}
+
 		left = _amplifier.next(left);
 		left = _saturator.next(left);
 		outputs[L_OUTPUT].setVoltage(left);
 
-		float right = 0.0f;
-		for (int i = 0; i < 4; ++i) {
-			right += _channels[i]->right;
-		}
 		right = _amplifier.next(right);
 		right = _saturator.next(right);
 		outputs[R_OUTPUT].setVoltage(right);
@@ -205,3 +232,192 @@ struct Mix4Widget : ModuleWidget {
 };
 
 Model* modelMix4 = bogaudio::createModel<Mix4, Mix4Widget>("Bogaudio-Mix4", "MIX4", "4-channel mixer and panner", "Mixer", "Panning");
+
+
+void Mix4x::sampleRateChange() {
+	float sr = APP->engine->getSampleRate();
+	for (int i = 0; i < 4; ++i) {
+		_channels[i]->setSampleRate(sr);
+	}
+	_returnASL.setParams(sr, MixerChannel::levelSlewTimeMS, MixerChannel::maxDecibels - MixerChannel::minDecibels);
+	_returnBSL.setParams(sr, MixerChannel::levelSlewTimeMS, MixerChannel::maxDecibels - MixerChannel::minDecibels);
+}
+
+void Mix4x::processAll(const ProcessArgs& args) {
+	if (!connected()) {
+		outputs[SEND_A_OUTPUT].setVoltage(0.0f);
+		outputs[SEND_B_OUTPUT].setVoltage(0.0f);
+		return;
+	}
+
+	Mix4ExpanderMessage* from = fromBase();
+	Mix4ExpanderMessage* to = toBase();
+	float sendA = 0.0f;
+	float sendB = 0.0f;
+	for (int i = 0; i < 4; ++i) {
+		_channels[i]->next(from->preFader[i], from->postFader[i]);
+		to->postEQ[i] = _channels[i]->postEQ;
+		sendA += _channels[i]->sendA;
+		sendB += _channels[i]->sendB;
+	}
+	outputs[SEND_A_OUTPUT].setVoltage(_saturatorA.next(sendA));
+	outputs[SEND_B_OUTPUT].setVoltage(_saturatorA.next(sendB));
+
+	float levelA = clamp(params[LEVEL_A_PARAM].getValue(), 0.0f, 1.0f);
+	if (inputs[LEVEL_A_INPUT].isConnected()) {
+		levelA *= clamp(inputs[LEVEL_A_INPUT].getVoltage() / 10.0f, 0.0f, 1.0f);
+	}
+	levelA = 1.0f - levelA;
+	levelA *= Amplifier::minDecibels;
+	_returnAAmp.setLevel(_returnASL.next(levelA));
+	if (inputs[L_A_INPUT].isConnected()) {
+		to->returnA[0] = _returnAAmp.next(inputs[L_A_INPUT].getVoltage());
+	}
+	else {
+		to->returnA[0] = 0.0f;
+	}
+	if (inputs[R_A_INPUT].isConnected()) {
+		to->returnA[1] = _returnAAmp.next(inputs[R_A_INPUT].getVoltage());
+	}
+	else {
+		to->returnA[1] = to->returnA[0];
+	}
+
+	float levelB = clamp(params[LEVEL_B_PARAM].getValue(), 0.0f, 1.0f);
+	levelB = 1.0f - levelB;
+	levelB *= Amplifier::minDecibels;
+	_returnBAmp.setLevel(_returnBSL.next(levelB));
+	if (inputs[L_B_INPUT].isConnected()) {
+		to->returnB[0] = _returnBAmp.next(inputs[L_B_INPUT].getVoltage());
+	}
+	else {
+		to->returnB[0] = 0.0f;
+	}
+	if (inputs[R_B_INPUT].isConnected()) {
+		to->returnB[1] = _returnBAmp.next(inputs[R_B_INPUT].getVoltage());
+	}
+	else {
+		to->returnB[1] = to->returnB[0];
+	}
+}
+
+struct Mix4xWidget : ModuleWidget {
+	static constexpr int hp = 15;
+
+	Mix4xWidget(Mix4x* module) {
+		setModule(module);
+		box.size = Vec(RACK_GRID_WIDTH * hp, RACK_GRID_HEIGHT);
+
+		{
+			SvgPanel *panel = new SvgPanel();
+			panel->box.size = box.size;
+			panel->setBackground(APP->window->loadSvg(asset::plugin(pluginInstance, "res/Mix4x.svg")));
+			addChild(panel);
+		}
+
+		addChild(createWidget<ScrewSilver>(Vec(15, 0)));
+		addChild(createWidget<ScrewSilver>(Vec(box.size.x - 30, 0)));
+		addChild(createWidget<ScrewSilver>(Vec(15, 365)));
+		addChild(createWidget<ScrewSilver>(Vec(box.size.x - 30, 365)));
+
+		// generated by svg_widgets.rb
+		auto low1ParamPosition = Vec(18.5, 43.0);
+		auto mid1ParamPosition = Vec(18.5, 89.0);
+		auto high1ParamPosition = Vec(18.5, 135.0);
+		auto a1ParamPosition = Vec(18.5, 180.0);
+		auto preA1ParamPosition = Vec(30.0, 208.0);
+		auto b1ParamPosition = Vec(18.5, 236.0);
+		auto preB1ParamPosition = Vec(30.0, 264.0);
+		auto low2ParamPosition = Vec(61.5, 43.0);
+		auto mid2ParamPosition = Vec(61.5, 89.0);
+		auto high2ParamPosition = Vec(61.5, 135.0);
+		auto a2ParamPosition = Vec(61.5, 180.0);
+		auto preA2ParamPosition = Vec(73.0, 208.0);
+		auto b2ParamPosition = Vec(61.5, 236.0);
+		auto preB2ParamPosition = Vec(73.0, 264.0);
+		auto low3ParamPosition = Vec(104.5, 43.0);
+		auto mid3ParamPosition = Vec(104.5, 89.0);
+		auto high3ParamPosition = Vec(104.5, 135.0);
+		auto a3ParamPosition = Vec(104.5, 180.0);
+		auto preA3ParamPosition = Vec(116.0, 208.0);
+		auto b3ParamPosition = Vec(104.5, 236.0);
+		auto preB3ParamPosition = Vec(116.0, 264.0);
+		auto low4ParamPosition = Vec(147.5, 43.0);
+		auto mid4ParamPosition = Vec(147.5, 89.0);
+		auto high4ParamPosition = Vec(147.5, 135.0);
+		auto a4ParamPosition = Vec(147.5, 180.0);
+		auto preA4ParamPosition = Vec(159.0, 208.0);
+		auto b4ParamPosition = Vec(147.5, 236.0);
+		auto preB4ParamPosition = Vec(159.0, 264.0);
+		auto levelAParamPosition = Vec(190.5, 138.0);
+		auto levelBParamPosition = Vec(190.5, 328.0);
+
+		auto a1InputPosition = Vec(14.5, 290.0);
+		auto b1InputPosition = Vec(14.5, 325.0);
+		auto a2InputPosition = Vec(57.5, 290.0);
+		auto b2InputPosition = Vec(57.5, 325.0);
+		auto a3InputPosition = Vec(100.5, 290.0);
+		auto b3InputPosition = Vec(100.5, 325.0);
+		auto a4InputPosition = Vec(143.5, 290.0);
+		auto b4InputPosition = Vec(143.5, 325.0);
+		auto lAInputPosition = Vec(186.5, 62.0);
+		auto rAInputPosition = Vec(186.5, 97.0);
+		auto levelAInputPosition = Vec(186.5, 170.0);
+		auto lBInputPosition = Vec(186.5, 252.0);
+		auto rBInputPosition = Vec(186.5, 287.0);
+
+		auto sendAOutputPosition = Vec(186.5, 24.0);
+		auto sendBOutputPosition = Vec(186.5, 214.0);
+		// end generated by svg_widgets.rb
+
+		addParam(createParam<Knob16>(low1ParamPosition, module, Mix4x::LOW1_PARAM));
+		addParam(createParam<Knob16>(mid1ParamPosition, module, Mix4x::MID1_PARAM));
+		addParam(createParam<Knob16>(high1ParamPosition, module, Mix4x::HIGH1_PARAM));
+		addParam(createParam<Knob16>(a1ParamPosition, module, Mix4x::A1_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preA1ParamPosition, module, Mix4x::PRE_A1_PARAM));
+		addParam(createParam<Knob16>(b1ParamPosition, module, Mix4x::B1_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preB1ParamPosition, module, Mix4x::PRE_B1_PARAM));
+		addParam(createParam<Knob16>(low2ParamPosition, module, Mix4x::LOW2_PARAM));
+		addParam(createParam<Knob16>(mid2ParamPosition, module, Mix4x::MID2_PARAM));
+		addParam(createParam<Knob16>(high2ParamPosition, module, Mix4x::HIGH2_PARAM));
+		addParam(createParam<Knob16>(a2ParamPosition, module, Mix4x::A2_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preA2ParamPosition, module, Mix4x::PRE_A2_PARAM));
+		addParam(createParam<Knob16>(b2ParamPosition, module, Mix4x::B2_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preB2ParamPosition, module, Mix4x::PRE_B2_PARAM));
+		addParam(createParam<Knob16>(low3ParamPosition, module, Mix4x::LOW3_PARAM));
+		addParam(createParam<Knob16>(mid3ParamPosition, module, Mix4x::MID3_PARAM));
+		addParam(createParam<Knob16>(high3ParamPosition, module, Mix4x::HIGH3_PARAM));
+		addParam(createParam<Knob16>(a3ParamPosition, module, Mix4x::A3_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preA3ParamPosition, module, Mix4x::PRE_A3_PARAM));
+		addParam(createParam<Knob16>(b3ParamPosition, module, Mix4x::B3_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preB3ParamPosition, module, Mix4x::PRE_B3_PARAM));
+		addParam(createParam<Knob16>(low4ParamPosition, module, Mix4x::LOW4_PARAM));
+		addParam(createParam<Knob16>(mid4ParamPosition, module, Mix4x::MID4_PARAM));
+		addParam(createParam<Knob16>(high4ParamPosition, module, Mix4x::HIGH4_PARAM));
+		addParam(createParam<Knob16>(a4ParamPosition, module, Mix4x::A4_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preA4ParamPosition, module, Mix4x::PRE_A4_PARAM));
+		addParam(createParam<Knob16>(b4ParamPosition, module, Mix4x::B4_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preB4ParamPosition, module, Mix4x::PRE_B4_PARAM));
+		addParam(createParam<Knob16>(levelAParamPosition, module, Mix4x::LEVEL_A_PARAM));
+		addParam(createParam<Knob16>(levelBParamPosition, module, Mix4x::LEVEL_B_PARAM));
+
+		addInput(createInput<Port24>(a1InputPosition, module, Mix4x::A1_INPUT));
+		addInput(createInput<Port24>(b1InputPosition, module, Mix4x::B1_INPUT));
+		addInput(createInput<Port24>(a2InputPosition, module, Mix4x::A2_INPUT));
+		addInput(createInput<Port24>(b2InputPosition, module, Mix4x::B2_INPUT));
+		addInput(createInput<Port24>(a3InputPosition, module, Mix4x::A3_INPUT));
+		addInput(createInput<Port24>(b3InputPosition, module, Mix4x::B3_INPUT));
+		addInput(createInput<Port24>(a4InputPosition, module, Mix4x::A4_INPUT));
+		addInput(createInput<Port24>(b4InputPosition, module, Mix4x::B4_INPUT));
+		addInput(createInput<Port24>(lAInputPosition, module, Mix4x::L_A_INPUT));
+		addInput(createInput<Port24>(rAInputPosition, module, Mix4x::R_A_INPUT));
+		addInput(createInput<Port24>(levelAInputPosition, module, Mix4x::LEVEL_A_INPUT));
+		addInput(createInput<Port24>(lBInputPosition, module, Mix4x::L_B_INPUT));
+		addInput(createInput<Port24>(rBInputPosition, module, Mix4x::R_B_INPUT));
+
+		addOutput(createOutput<Port24>(sendAOutputPosition, module, Mix4x::SEND_A_OUTPUT));
+		addOutput(createOutput<Port24>(sendBOutputPosition, module, Mix4x::SEND_B_OUTPUT));
+	}
+};
+
+Model* modelMix4x = createModel<Mix4x, Mix4xWidget>("Bogaudio-Mix4x", "MIX4X", "Expander for MIX4, adds EQs and sends", "Mixer", "Expander");
diff --git a/src/Mix4.hpp b/src/Mix4.hpp
@@ -7,10 +7,15 @@
 using namespace bogaudio::dsp;
 
 extern Model* modelMix4;
+extern Model* modelMix4x;
 
 namespace bogaudio {
 
-struct Mix4 : BGModule {
+struct Mix4x;
+
+typedef MixerExpanderMessage<4> Mix4ExpanderMessage;
+
+struct Mix4 : ExpandableModule<Mix4ExpanderMessage, Mix4x> {
 	enum ParamsIds {
 		LEVEL1_PARAM,
 		PAN1_PARAM,
@@ -54,11 +59,14 @@ struct Mix4 : BGModule {
 
 	int _polyChannelOffset = -1;
 	MixerChannel* _channels[4] {};
+	Panner _panners[4];
+	bogaudio::dsp::SlewLimiter _panSLs[4];
 	Amplifier _amplifier;
 	bogaudio::dsp::SlewLimiter _slewLimiter;
 	Saturator _saturator;
 	RootMeanSquare _rms;
 	float _rmsLevel = 0.0f;
+	Mix4ExpanderMessage _dummyExpanderMessage;
 
 	Mix4() {
 		config(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS);
@@ -78,10 +86,10 @@ struct Mix4 : BGModule {
 		configParam(MIX_PARAM, 0.0f, 1.0f, levelDefault, "Master level", " dB", 0.0f, MixerChannel::maxDecibels - MixerChannel::minDecibels, MixerChannel::minDecibels);
 		configParam(MIX_MUTE_PARAM, 0.0f, 1.0f, 0.0f, "Master mute");
 
-		_channels[0] = new MixerChannel(params[LEVEL1_PARAM], params[PAN1_PARAM], params[MUTE1_PARAM], inputs[CV1_INPUT], inputs[PAN1_INPUT]);
-		_channels[1] = new MixerChannel(params[LEVEL2_PARAM], params[PAN2_PARAM], params[MUTE2_PARAM], inputs[CV2_INPUT], inputs[PAN2_INPUT]);
-		_channels[2] = new MixerChannel(params[LEVEL3_PARAM], params[PAN3_PARAM], params[MUTE3_PARAM], inputs[CV3_INPUT], inputs[PAN3_INPUT]);
-		_channels[3] = new MixerChannel(params[LEVEL4_PARAM], params[PAN4_PARAM], params[MUTE4_PARAM], inputs[CV4_INPUT], inputs[PAN4_INPUT]);
+		_channels[0] = new MixerChannel(params[LEVEL1_PARAM], params[MUTE1_PARAM], inputs[CV1_INPUT]);
+		_channels[1] = new MixerChannel(params[LEVEL2_PARAM], params[MUTE2_PARAM], inputs[CV2_INPUT]);
+		_channels[2] = new MixerChannel(params[LEVEL3_PARAM], params[MUTE3_PARAM], inputs[CV3_INPUT]);
+		_channels[3] = new MixerChannel(params[LEVEL4_PARAM], params[MUTE4_PARAM], inputs[CV4_INPUT]);
 		sampleRateChange();
 		_rms.setSensitivity(0.05f);
 	}
@@ -94,7 +102,118 @@ struct Mix4 : BGModule {
 	json_t* dataToJson() override;
 	void dataFromJson(json_t* root) override;
 	void sampleRateChange() override;
-	void processChannel(const ProcessArgs& args, int _c) override;
+	void processAll(const ProcessArgs& args) override;
+};
+
+struct Mix4x : ExpanderModule<Mix4ExpanderMessage, Mix4> {
+	enum ParamsIds {
+		LOW1_PARAM,
+		MID1_PARAM,
+		HIGH1_PARAM,
+		A1_PARAM,
+		PRE_A1_PARAM,
+		B1_PARAM,
+		PRE_B1_PARAM,
+		LOW2_PARAM,
+		MID2_PARAM,
+		HIGH2_PARAM,
+		A2_PARAM,
+		PRE_A2_PARAM,
+		B2_PARAM,
+		PRE_B2_PARAM,
+		LOW3_PARAM,
+		MID3_PARAM,
+		HIGH3_PARAM,
+		A3_PARAM,
+		PRE_A3_PARAM,
+		B3_PARAM,
+		PRE_B3_PARAM,
+		LOW4_PARAM,
+		MID4_PARAM,
+		HIGH4_PARAM,
+		A4_PARAM,
+		PRE_A4_PARAM,
+		B4_PARAM,
+		PRE_B4_PARAM,
+		LEVEL_A_PARAM,
+		LEVEL_B_PARAM,
+		NUM_PARAMS
+	};
+
+	enum InputsIds {
+		A1_INPUT,
+		B1_INPUT,
+		A2_INPUT,
+		B2_INPUT,
+		A3_INPUT,
+		B3_INPUT,
+		A4_INPUT,
+		B4_INPUT,
+		L_A_INPUT,
+		R_A_INPUT,
+		LEVEL_A_INPUT,
+		L_B_INPUT,
+		R_B_INPUT,
+		NUM_INPUTS
+	};
+
+	enum OutputsIds {
+		SEND_A_OUTPUT,
+		SEND_B_OUTPUT,
+		NUM_OUTPUTS
+	};
+
+	MixerExpanderChannel* _channels[4] {};
+	Saturator _saturatorA, _saturatorB;
+	Amplifier _returnAAmp, _returnBAmp;
+	bogaudio::dsp::SlewLimiter _returnASL, _returnBSL;
+
+	Mix4x() {
+		config(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS);
+		configParam<EQParamQuantity>(LOW1_PARAM, -1.0f, 1.0f, 0.0f, "Channel 1 low", " dB");
+		configParam<EQParamQuantity>(MID1_PARAM, -1.0f, 1.0f, 0.0f, "Channel 1 mid", " dB");
+		configParam<EQParamQuantity>(HIGH1_PARAM, -1.0f, 1.0f, 0.0f, "Channel 1 high", " dB");
+		configParam<AmplifierParamQuantity>(A1_PARAM, 0.0f, 1.0f, 0.0f, "Channel 1 A send");
+		configParam(PRE_A1_PARAM, 0.0f, 1.0f, 0.0f, "Channel 1 A send pre/post");
+		configParam<AmplifierParamQuantity>(B1_PARAM, 0.0f, 1.0f, 0.0f, "Channel 1 B send");
+		configParam(PRE_B1_PARAM, 0.0f, 1.0f, 0.0f, "Channel 1 B send pre/post");
+		configParam<EQParamQuantity>(LOW2_PARAM, -1.0f, 1.0f, 0.0f, "Channel 2 low", " dB");
+		configParam<EQParamQuantity>(MID2_PARAM, -1.0f, 1.0f, 0.0f, "Channel 2 mid", " dB");
+		configParam<EQParamQuantity>(HIGH2_PARAM, -1.0f, 1.0f, 0.0f, "Channel 2 high", " dB");
+		configParam<AmplifierParamQuantity>(A2_PARAM, 0.0f, 1.0f, 0.0f, "Channel 2 A send");
+		configParam(PRE_A2_PARAM, 0.0f, 1.0f, 0.0f, "Channel 2 A send pre/post");
+		configParam<AmplifierParamQuantity>(B2_PARAM, 0.0f, 1.0f, 0.0f, "Channel 2 B send");
+		configParam(PRE_B2_PARAM, 0.0f, 1.0f, 0.0f, "Channel 2 B send pre/post");
+		configParam<EQParamQuantity>(LOW3_PARAM, -1.0f, 1.0f, 0.0f, "Channel 3 low", " dB");
+		configParam<EQParamQuantity>(MID3_PARAM, -1.0f, 1.0f, 0.0f, "Channel 3 mid", " dB");
+		configParam<EQParamQuantity>(HIGH3_PARAM, -1.0f, 1.0f, 0.0f, "Channel 3 high", " dB");
+		configParam<AmplifierParamQuantity>(A3_PARAM, 0.0f, 1.0f, 0.0f, "Channel 3 A send");
+		configParam(PRE_A3_PARAM, 0.0f, 1.0f, 0.0f, "Channel 3 A send pre/post");
+		configParam<AmplifierParamQuantity>(B3_PARAM, 0.0f, 1.0f, 0.0f, "Channel 3 B send");
+		configParam(PRE_B3_PARAM, 0.0f, 1.0f, 0.0f, "Channel 3 B send pre/post");
+		configParam<EQParamQuantity>(LOW4_PARAM, -1.0f, 1.0f, 0.0f, "Channel 4 low", " dB");
+		configParam<EQParamQuantity>(MID4_PARAM, -1.0f, 1.0f, 0.0f, "Channel 4 mid", " dB");
+		configParam<EQParamQuantity>(HIGH4_PARAM, -1.0f, 1.0f, 0.0f, "Channel 4 high", " dB");
+		configParam<AmplifierParamQuantity>(A4_PARAM, 0.0f, 1.0f, 0.0f, "Channel 4 A send");
+		configParam(PRE_A4_PARAM, 0.0f, 1.0f, 0.0f, "Channel 4 A send pre/post");
+		configParam<AmplifierParamQuantity>(B4_PARAM, 0.0f, 1.0f, 0.0f, "Channel 4 B send");
+		configParam(PRE_B4_PARAM, 0.0f, 1.0f, 0.0f, "Channel 4 B send pre/post");
+		configParam<AmplifierParamQuantity>(LEVEL_A_PARAM, 0.0f, 1.0f, 0.8f, "A return level");
+		configParam<AmplifierParamQuantity>(LEVEL_B_PARAM, 0.0f, 1.0f, 0.8f, "B return level");
+
+		_channels[0] = new MixerExpanderChannel(params[LOW1_PARAM], params[MID1_PARAM], params[HIGH1_PARAM], params[A1_PARAM], params[B1_PARAM], params[PRE_A1_PARAM], params[PRE_B1_PARAM], inputs[A1_INPUT], inputs[B1_INPUT]);
+		_channels[1] = new MixerExpanderChannel(params[LOW2_PARAM], params[MID2_PARAM], params[HIGH2_PARAM], params[A2_PARAM], params[B2_PARAM], params[PRE_A2_PARAM], params[PRE_B2_PARAM], inputs[A2_INPUT], inputs[B2_INPUT]);
+		_channels[2] = new MixerExpanderChannel(params[LOW3_PARAM], params[MID3_PARAM], params[HIGH3_PARAM], params[A3_PARAM], params[B3_PARAM], params[PRE_A3_PARAM], params[PRE_B3_PARAM], inputs[A3_INPUT], inputs[B3_INPUT]);
+		_channels[3] = new MixerExpanderChannel(params[LOW4_PARAM], params[MID4_PARAM], params[HIGH4_PARAM], params[A4_PARAM], params[B4_PARAM], params[PRE_A4_PARAM], params[PRE_B4_PARAM], inputs[A4_INPUT], inputs[B4_INPUT]);
+	}
+	virtual ~Mix4x() {
+		for (int i = 0; i < 4; ++i) {
+			delete _channels[i];
+		}
+	}
+
+	void sampleRateChange() override;
+	void processAll(const ProcessArgs& args) override;
 };
 
 } // namespace bogaudio
diff --git a/src/Mix8.cpp b/src/Mix8.cpp
@@ -20,13 +20,20 @@ void Mix8::sampleRateChange() {
 	float sr = APP->engine->getSampleRate();
 	for (int i = 0; i < 8; ++i) {
 		_channels[i]->setSampleRate(sr);
+		_panSLs[i].setParams(sr, MIXER_PAN_SLEW_MS, 2.0f);
 	}
 	_slewLimiter.setParams(sr, MixerChannel::levelSlewTimeMS, MixerChannel::maxDecibels - MixerChannel::minDecibels);
 	_rms.setSampleRate(sr);
 }
 
-void Mix8::processChannel(const ProcessArgs& args, int _c) {
-	bool stereo = outputs[L_OUTPUT].isConnected() && outputs[R_OUTPUT].isConnected();
+void Mix8::processAll(const ProcessArgs& args) {
+	Mix8ExpanderMessage* toExp = &_dummyExpanderMessage;
+	Mix8ExpanderMessage* fromExp = &_dummyExpanderMessage;
+	if (connected()) {
+		toExp = toExpander();
+		fromExp = fromExpander();
+	}
+
 	bool solo =
 		params[MUTE1_PARAM].getValue() > 1.5f ||
 		params[MUTE2_PARAM].getValue() > 1.5f ||
@@ -44,7 +51,8 @@ void Mix8::processChannel(const ProcessArgs& args, int _c) {
 		} else {
 			sample = inputs[IN1_INPUT].getVoltageSum();
 		}
-		_channels[0]->next(sample, stereo, solo);
+		_channels[0]->next(sample, solo);
+		toExp->preFader[0] = sample;
 
 		for (int i = 1; i < 8; ++i) {
 			float sample = 0.0f;
@@ -54,7 +62,8 @@ void Mix8::processChannel(const ProcessArgs& args, int _c) {
 			else if (_polyChannelOffset >= 0) {
 				sample = inputs[IN1_INPUT].getPolyVoltage(_polyChannelOffset + i);
 			}
-			_channels[i]->next(sample, stereo, solo);
+			_channels[i]->next(sample, solo);
+			toExp->preFader[i] = sample;
 		}
 	}
 
@@ -69,27 +78,45 @@ void Mix8::processChannel(const ProcessArgs& args, int _c) {
 	}
 	_amplifier.setLevel(_slewLimiter.next(level));
 
+	float outs[8];
+	for (int i = 0; i < 8; ++i) {
+		toExp->postFader[i] = outs[i] = _channels[i]->out;
+	}
+
 	float mono = 0.0f;
+	float left = 0.0f;
+	float right = 0.0f;
+	if (connected()) {
+		mono += fromExp->returnA[0] + fromExp->returnB[0];
+		left += fromExp->returnA[0] + fromExp->returnB[0];
+		right += fromExp->returnA[1] + fromExp->returnB[1];
+		std::copy(fromExp->postEQ, fromExp->postEQ + 8, outs);
+	}
+
 	for (int i = 0; i < 8; ++i) {
-		mono += _channels[i]->out;
+		mono += outs[i];
 	}
 	mono = _amplifier.next(mono);
 	mono = _saturator.next(mono);
 	_rmsLevel = _rms.next(mono) / 5.0f;
 
-	if (stereo) {
-		float left = 0.0f;
+	if (outputs[L_OUTPUT].isConnected() && outputs[R_OUTPUT].isConnected()) {
 		for (int i = 0; i < 8; ++i) {
-			left += _channels[i]->left;
+			float pan = clamp(params[PAN1_PARAM + 3 * i].getValue(), -1.0f, 1.0f);
+			if (inputs[PAN1_INPUT + 3 * i].isConnected()) {
+				pan *= clamp(inputs[PAN1_INPUT + 3 * i].getVoltage() / 5.0f, -1.0f, 1.0f);
+			}
+			_panners[i].setPan(_panSLs[i].next(pan));
+			float l, r;
+			_panners[i].next(outs[i], l, r);
+			left += l;
+			right += r;
 		}
+
 		left = _amplifier.next(left);
 		left = _saturator.next(left);
 		outputs[L_OUTPUT].setVoltage(left);
 
-		float right = 0.0f;
-		for (int i = 0; i < 8; ++i) {
-			right += _channels[i]->right;
-		}
 		right = _amplifier.next(right);
 		right = _saturator.next(right);
 		outputs[R_OUTPUT].setVoltage(right);
@@ -255,3 +282,264 @@ struct Mix8Widget : ModuleWidget {
 };
 
 Model* modelMix8 = bogaudio::createModel<Mix8, Mix8Widget>("Bogaudio-Mix8", "MIX8", "8-channel mixer and panner", "Mixer", "Panning");
+
+
+void Mix8x::sampleRateChange() {
+	float sr = APP->engine->getSampleRate();
+	for (int i = 0; i < 8; ++i) {
+		_channels[i]->setSampleRate(sr);
+	}
+	_returnASL.setParams(sr, MixerChannel::levelSlewTimeMS, MixerChannel::maxDecibels - MixerChannel::minDecibels);
+	_returnBSL.setParams(sr, MixerChannel::levelSlewTimeMS, MixerChannel::maxDecibels - MixerChannel::minDecibels);
+}
+
+void Mix8x::processAll(const ProcessArgs& args) {
+	if (!connected()) {
+		outputs[SEND_A_OUTPUT].setVoltage(0.0f);
+		outputs[SEND_B_OUTPUT].setVoltage(0.0f);
+		return;
+	}
+
+	Mix8ExpanderMessage* from = fromBase();
+	Mix8ExpanderMessage* to = toBase();
+	float sendA = 0.0f;
+	float sendB = 0.0f;
+	for (int i = 0; i < 8; ++i) {
+		_channels[i]->next(from->preFader[i], from->postFader[i]);
+		to->postEQ[i] = _channels[i]->postEQ;
+		sendA += _channels[i]->sendA;
+		sendB += _channels[i]->sendB;
+	}
+	outputs[SEND_A_OUTPUT].setVoltage(_saturatorA.next(sendA));
+	outputs[SEND_B_OUTPUT].setVoltage(_saturatorA.next(sendB));
+
+	float levelA = clamp(params[LEVEL_A_PARAM].getValue(), 0.0f, 1.0f);
+	if (inputs[LEVEL_A_INPUT].isConnected()) {
+		levelA *= clamp(inputs[LEVEL_A_INPUT].getVoltage() / 10.0f, 0.0f, 1.0f);
+	}
+	levelA = 1.0f - levelA;
+	levelA *= Amplifier::minDecibels;
+	_returnAAmp.setLevel(_returnASL.next(levelA));
+	if (inputs[L_A_INPUT].isConnected()) {
+		to->returnA[0] = _returnAAmp.next(inputs[L_A_INPUT].getVoltage());
+	}
+	else {
+		to->returnA[0] = 0.0f;
+	}
+	if (inputs[R_A_INPUT].isConnected()) {
+		to->returnA[1] = _returnAAmp.next(inputs[R_A_INPUT].getVoltage());
+	}
+	else {
+		to->returnA[1] = to->returnA[0];
+	}
+
+	float levelB = clamp(params[LEVEL_B_PARAM].getValue(), 0.0f, 1.0f);
+	levelB = 1.0f - levelB;
+	levelB *= Amplifier::minDecibels;
+	_returnBAmp.setLevel(_returnBSL.next(levelB));
+	if (inputs[L_B_INPUT].isConnected()) {
+		to->returnB[0] = _returnBAmp.next(inputs[L_B_INPUT].getVoltage());
+	}
+	else {
+		to->returnB[0] = 0.0f;
+	}
+	if (inputs[R_B_INPUT].isConnected()) {
+		to->returnB[1] = _returnBAmp.next(inputs[R_B_INPUT].getVoltage());
+	}
+	else {
+		to->returnB[1] = to->returnB[0];
+	}
+}
+
+struct Mix8xWidget : ModuleWidget {
+	static constexpr int hp = 27;
+
+	Mix8xWidget(Mix8x* module) {
+		setModule(module);
+		box.size = Vec(RACK_GRID_WIDTH * hp, RACK_GRID_HEIGHT);
+
+		{
+			SvgPanel *panel = new SvgPanel();
+			panel->box.size = box.size;
+			panel->setBackground(APP->window->loadSvg(asset::plugin(pluginInstance, "res/Mix8x.svg")));
+			addChild(panel);
+		}
+
+		addChild(createWidget<ScrewSilver>(Vec(15, 0)));
+		addChild(createWidget<ScrewSilver>(Vec(box.size.x - 30, 0)));
+		addChild(createWidget<ScrewSilver>(Vec(15, 365)));
+		addChild(createWidget<ScrewSilver>(Vec(box.size.x - 30, 365)));
+
+		// generated by svg_widgets.rb
+		auto low1ParamPosition = Vec(18.5, 43.0);
+		auto mid1ParamPosition = Vec(18.5, 89.0);
+		auto high1ParamPosition = Vec(18.5, 135.0);
+		auto a1ParamPosition = Vec(18.5, 180.0);
+		auto preA1ParamPosition = Vec(30.0, 208.0);
+		auto b1ParamPosition = Vec(18.5, 236.0);
+		auto preB1ParamPosition = Vec(30.0, 264.0);
+		auto low2ParamPosition = Vec(62.5, 43.0);
+		auto mid2ParamPosition = Vec(62.5, 89.0);
+		auto high2ParamPosition = Vec(62.5, 135.0);
+		auto a2ParamPosition = Vec(62.5, 180.0);
+		auto preA2ParamPosition = Vec(74.0, 208.0);
+		auto b2ParamPosition = Vec(62.5, 236.0);
+		auto preB2ParamPosition = Vec(74.0, 264.0);
+		auto low3ParamPosition = Vec(106.5, 43.0);
+		auto mid3ParamPosition = Vec(106.5, 89.0);
+		auto high3ParamPosition = Vec(106.5, 135.0);
+		auto a3ParamPosition = Vec(106.5, 180.0);
+		auto preA3ParamPosition = Vec(118.0, 208.0);
+		auto b3ParamPosition = Vec(106.5, 236.0);
+		auto preB3ParamPosition = Vec(118.0, 264.0);
+		auto low4ParamPosition = Vec(150.5, 43.0);
+		auto mid4ParamPosition = Vec(150.5, 89.0);
+		auto high4ParamPosition = Vec(150.5, 135.0);
+		auto a4ParamPosition = Vec(150.5, 180.0);
+		auto preA4ParamPosition = Vec(162.0, 208.0);
+		auto b4ParamPosition = Vec(150.5, 236.0);
+		auto preB4ParamPosition = Vec(162.0, 264.0);
+		auto low5ParamPosition = Vec(194.5, 43.0);
+		auto mid5ParamPosition = Vec(194.5, 89.0);
+		auto high5ParamPosition = Vec(194.5, 135.0);
+		auto a5ParamPosition = Vec(194.5, 180.0);
+		auto preA5ParamPosition = Vec(206.0, 208.0);
+		auto b5ParamPosition = Vec(194.5, 236.0);
+		auto preB5ParamPosition = Vec(206.0, 264.0);
+		auto low6ParamPosition = Vec(238.5, 43.0);
+		auto mid6ParamPosition = Vec(238.5, 89.0);
+		auto high6ParamPosition = Vec(238.5, 135.0);
+		auto a6ParamPosition = Vec(238.5, 180.0);
+		auto preA6ParamPosition = Vec(250.0, 208.0);
+		auto b6ParamPosition = Vec(238.5, 236.0);
+		auto preB6ParamPosition = Vec(250.0, 264.0);
+		auto low7ParamPosition = Vec(282.5, 43.0);
+		auto mid7ParamPosition = Vec(282.5, 89.0);
+		auto high7ParamPosition = Vec(282.5, 135.0);
+		auto a7ParamPosition = Vec(282.5, 180.0);
+		auto preA7ParamPosition = Vec(294.0, 208.0);
+		auto b7ParamPosition = Vec(282.5, 236.0);
+		auto preB7ParamPosition = Vec(294.0, 264.0);
+		auto low8ParamPosition = Vec(326.5, 43.0);
+		auto mid8ParamPosition = Vec(326.5, 89.0);
+		auto high8ParamPosition = Vec(326.5, 135.0);
+		auto a8ParamPosition = Vec(326.5, 180.0);
+		auto preA8ParamPosition = Vec(338.0, 208.0);
+		auto b8ParamPosition = Vec(326.5, 236.0);
+		auto preB8ParamPosition = Vec(338.0, 264.0);
+		auto levelAParamPosition = Vec(370.5, 138.0);
+		auto levelBParamPosition = Vec(370.5, 328.0);
+
+		auto a1InputPosition = Vec(14.5, 290.0);
+		auto b1InputPosition = Vec(14.5, 325.0);
+		auto a2InputPosition = Vec(58.5, 290.0);
+		auto b2InputPosition = Vec(58.5, 325.0);
+		auto a3InputPosition = Vec(102.5, 290.0);
+		auto b3InputPosition = Vec(102.5, 325.0);
+		auto a4InputPosition = Vec(146.5, 290.0);
+		auto b4InputPosition = Vec(146.5, 325.0);
+		auto a5InputPosition = Vec(190.5, 290.0);
+		auto b5InputPosition = Vec(190.5, 325.0);
+		auto a6InputPosition = Vec(234.5, 290.0);
+		auto b6InputPosition = Vec(234.5, 325.0);
+		auto a7InputPosition = Vec(278.5, 290.0);
+		auto b7InputPosition = Vec(278.5, 325.0);
+		auto a8InputPosition = Vec(322.5, 290.0);
+		auto b8InputPosition = Vec(322.5, 325.0);
+		auto lAInputPosition = Vec(366.5, 62.0);
+		auto rAInputPosition = Vec(366.5, 97.0);
+		auto levelAInputPosition = Vec(366.5, 170.0);
+		auto lBInputPosition = Vec(366.5, 252.0);
+		auto rBInputPosition = Vec(366.5, 287.0);
+
+		auto sendAOutputPosition = Vec(366.5, 24.0);
+		auto sendBOutputPosition = Vec(366.5, 214.0);
+		// end generated by svg_widgets.rb
+
+		addParam(createParam<Knob16>(low1ParamPosition, module, Mix8x::LOW1_PARAM));
+		addParam(createParam<Knob16>(mid1ParamPosition, module, Mix8x::MID1_PARAM));
+		addParam(createParam<Knob16>(high1ParamPosition, module, Mix8x::HIGH1_PARAM));
+		addParam(createParam<Knob16>(a1ParamPosition, module, Mix8x::A1_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preA1ParamPosition, module, Mix8x::PRE_A1_PARAM));
+		addParam(createParam<Knob16>(b1ParamPosition, module, Mix8x::B1_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preB1ParamPosition, module, Mix8x::PRE_B1_PARAM));
+		addParam(createParam<Knob16>(low2ParamPosition, module, Mix8x::LOW2_PARAM));
+		addParam(createParam<Knob16>(mid2ParamPosition, module, Mix8x::MID2_PARAM));
+		addParam(createParam<Knob16>(high2ParamPosition, module, Mix8x::HIGH2_PARAM));
+		addParam(createParam<Knob16>(a2ParamPosition, module, Mix8x::A2_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preA2ParamPosition, module, Mix8x::PRE_A2_PARAM));
+		addParam(createParam<Knob16>(b2ParamPosition, module, Mix8x::B2_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preB2ParamPosition, module, Mix8x::PRE_B2_PARAM));
+		addParam(createParam<Knob16>(low3ParamPosition, module, Mix8x::LOW3_PARAM));
+		addParam(createParam<Knob16>(mid3ParamPosition, module, Mix8x::MID3_PARAM));
+		addParam(createParam<Knob16>(high3ParamPosition, module, Mix8x::HIGH3_PARAM));
+		addParam(createParam<Knob16>(a3ParamPosition, module, Mix8x::A3_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preA3ParamPosition, module, Mix8x::PRE_A3_PARAM));
+		addParam(createParam<Knob16>(b3ParamPosition, module, Mix8x::B3_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preB3ParamPosition, module, Mix8x::PRE_B3_PARAM));
+		addParam(createParam<Knob16>(low4ParamPosition, module, Mix8x::LOW4_PARAM));
+		addParam(createParam<Knob16>(mid4ParamPosition, module, Mix8x::MID4_PARAM));
+		addParam(createParam<Knob16>(high4ParamPosition, module, Mix8x::HIGH4_PARAM));
+		addParam(createParam<Knob16>(a4ParamPosition, module, Mix8x::A4_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preA4ParamPosition, module, Mix8x::PRE_A4_PARAM));
+		addParam(createParam<Knob16>(b4ParamPosition, module, Mix8x::B4_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preB4ParamPosition, module, Mix8x::PRE_B4_PARAM));
+		addParam(createParam<Knob16>(low5ParamPosition, module, Mix8x::LOW5_PARAM));
+		addParam(createParam<Knob16>(mid5ParamPosition, module, Mix8x::MID5_PARAM));
+		addParam(createParam<Knob16>(high5ParamPosition, module, Mix8x::HIGH5_PARAM));
+		addParam(createParam<Knob16>(a5ParamPosition, module, Mix8x::A5_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preA5ParamPosition, module, Mix8x::PRE_A5_PARAM));
+		addParam(createParam<Knob16>(b5ParamPosition, module, Mix8x::B5_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preB5ParamPosition, module, Mix8x::PRE_B5_PARAM));
+		addParam(createParam<Knob16>(low6ParamPosition, module, Mix8x::LOW6_PARAM));
+		addParam(createParam<Knob16>(mid6ParamPosition, module, Mix8x::MID6_PARAM));
+		addParam(createParam<Knob16>(high6ParamPosition, module, Mix8x::HIGH6_PARAM));
+		addParam(createParam<Knob16>(a6ParamPosition, module, Mix8x::A6_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preA6ParamPosition, module, Mix8x::PRE_A6_PARAM));
+		addParam(createParam<Knob16>(b6ParamPosition, module, Mix8x::B6_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preB6ParamPosition, module, Mix8x::PRE_B6_PARAM));
+		addParam(createParam<Knob16>(low7ParamPosition, module, Mix8x::LOW7_PARAM));
+		addParam(createParam<Knob16>(mid7ParamPosition, module, Mix8x::MID7_PARAM));
+		addParam(createParam<Knob16>(high7ParamPosition, module, Mix8x::HIGH7_PARAM));
+		addParam(createParam<Knob16>(a7ParamPosition, module, Mix8x::A7_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preA7ParamPosition, module, Mix8x::PRE_A7_PARAM));
+		addParam(createParam<Knob16>(b7ParamPosition, module, Mix8x::B7_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preB7ParamPosition, module, Mix8x::PRE_B7_PARAM));
+		addParam(createParam<Knob16>(low8ParamPosition, module, Mix8x::LOW8_PARAM));
+		addParam(createParam<Knob16>(mid8ParamPosition, module, Mix8x::MID8_PARAM));
+		addParam(createParam<Knob16>(high8ParamPosition, module, Mix8x::HIGH8_PARAM));
+		addParam(createParam<Knob16>(a8ParamPosition, module, Mix8x::A8_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preA8ParamPosition, module, Mix8x::PRE_A8_PARAM));
+		addParam(createParam<Knob16>(b8ParamPosition, module, Mix8x::B8_PARAM));
+		addParam(createParam<IndicatorButtonGreen9>(preB8ParamPosition, module, Mix8x::PRE_B8_PARAM));
+		addParam(createParam<Knob16>(levelAParamPosition, module, Mix8x::LEVEL_A_PARAM));
+		addParam(createParam<Knob16>(levelBParamPosition, module, Mix8x::LEVEL_B_PARAM));
+
+		addInput(createInput<Port24>(a1InputPosition, module, Mix8x::A1_INPUT));
+		addInput(createInput<Port24>(b1InputPosition, module, Mix8x::B1_INPUT));
+		addInput(createInput<Port24>(a2InputPosition, module, Mix8x::A2_INPUT));
+		addInput(createInput<Port24>(b2InputPosition, module, Mix8x::B2_INPUT));
+		addInput(createInput<Port24>(a3InputPosition, module, Mix8x::A3_INPUT));
+		addInput(createInput<Port24>(b3InputPosition, module, Mix8x::B3_INPUT));
+		addInput(createInput<Port24>(a4InputPosition, module, Mix8x::A4_INPUT));
+		addInput(createInput<Port24>(b4InputPosition, module, Mix8x::B4_INPUT));
+		addInput(createInput<Port24>(a5InputPosition, module, Mix8x::A5_INPUT));
+		addInput(createInput<Port24>(b5InputPosition, module, Mix8x::B5_INPUT));
+		addInput(createInput<Port24>(a6InputPosition, module, Mix8x::A6_INPUT));
+		addInput(createInput<Port24>(b6InputPosition, module, Mix8x::B6_INPUT));
+		addInput(createInput<Port24>(a7InputPosition, module, Mix8x::A7_INPUT));
+		addInput(createInput<Port24>(b7InputPosition, module, Mix8x::B7_INPUT));
+		addInput(createInput<Port24>(a8InputPosition, module, Mix8x::A8_INPUT));
+		addInput(createInput<Port24>(b8InputPosition, module, Mix8x::B8_INPUT));
+		addInput(createInput<Port24>(lAInputPosition, module, Mix8x::L_A_INPUT));
+		addInput(createInput<Port24>(rAInputPosition, module, Mix8x::R_A_INPUT));
+		addInput(createInput<Port24>(levelAInputPosition, module, Mix8x::LEVEL_A_INPUT));
+		addInput(createInput<Port24>(lBInputPosition, module, Mix8x::L_B_INPUT));
+		addInput(createInput<Port24>(rBInputPosition, module, Mix8x::R_B_INPUT));
+
+		addOutput(createOutput<Port24>(sendAOutputPosition, module, Mix8x::SEND_A_OUTPUT));
+		addOutput(createOutput<Port24>(sendBOutputPosition, module, Mix8x::SEND_B_OUTPUT));
+	}
+};
+
+Model* modelMix8x = createModel<Mix8x, Mix8xWidget>("Bogaudio-Mix8x", "MIX8X", "Expander for MIX8, adds EQs and sends", "Mixer", "Expander");
diff --git a/src/Mix8.hpp b/src/Mix8.hpp
@@ -7,10 +7,15 @@
 using namespace bogaudio::dsp;
 
 extern Model* modelMix8;
+extern Model* modelMix8x;
 
 namespace bogaudio {
 
-struct Mix8 : BGModule {
+struct Mix8x;
+
+typedef MixerExpanderMessage<8> Mix8ExpanderMessage;
+
+struct Mix8 : ExpandableModule<Mix8ExpanderMessage, Mix8x> {
 	enum ParamsIds {
 		LEVEL1_PARAM,
 		MUTE1_PARAM,
@@ -78,11 +83,14 @@ struct Mix8 : BGModule {
 
 	int _polyChannelOffset = -1;
 	MixerChannel* _channels[8] {};
+	Panner _panners[8];
+	bogaudio::dsp::SlewLimiter _panSLs[8];
 	Amplifier _amplifier;
 	bogaudio::dsp::SlewLimiter _slewLimiter;
 	Saturator _saturator;
 	RootMeanSquare _rms;
 	float _rmsLevel = 0.0f;
+	Mix8ExpanderMessage _dummyExpanderMessage;
 
 	Mix8() {
 		config(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS);
@@ -114,14 +122,14 @@ struct Mix8 : BGModule {
 		configParam(MIX_PARAM, 0.0f, 1.0f, levelDefault, "Master level", " dB", 0.0f, MixerChannel::maxDecibels - MixerChannel::minDecibels, MixerChannel::minDecibels);
 		configParam(MIX_MUTE_PARAM, 0.0f, 1.0f, 0.0f, "Master mute");
 
-		_channels[0] = new MixerChannel(params[LEVEL1_PARAM], params[PAN1_PARAM], params[MUTE1_PARAM], inputs[CV1_INPUT], inputs[PAN1_INPUT]);
-		_channels[1] = new MixerChannel(params[LEVEL2_PARAM], params[PAN2_PARAM], params[MUTE2_PARAM], inputs[CV2_INPUT], inputs[PAN2_INPUT]);
-		_channels[2] = new MixerChannel(params[LEVEL3_PARAM], params[PAN3_PARAM], params[MUTE3_PARAM], inputs[CV3_INPUT], inputs[PAN3_INPUT]);
-		_channels[3] = new MixerChannel(params[LEVEL4_PARAM], params[PAN4_PARAM], params[MUTE4_PARAM], inputs[CV4_INPUT], inputs[PAN4_INPUT]);
-		_channels[4] = new MixerChannel(params[LEVEL5_PARAM], params[PAN5_PARAM], params[MUTE5_PARAM], inputs[CV5_INPUT], inputs[PAN5_INPUT]);
-		_channels[5] = new MixerChannel(params[LEVEL6_PARAM], params[PAN6_PARAM], params[MUTE6_PARAM], inputs[CV6_INPUT], inputs[PAN6_INPUT]);
-		_channels[6] = new MixerChannel(params[LEVEL7_PARAM], params[PAN7_PARAM], params[MUTE7_PARAM], inputs[CV7_INPUT], inputs[PAN7_INPUT]);
-		_channels[7] = new MixerChannel(params[LEVEL8_PARAM], params[PAN8_PARAM], params[MUTE8_PARAM], inputs[CV8_INPUT], inputs[PAN8_INPUT]);
+		_channels[0] = new MixerChannel(params[LEVEL1_PARAM], params[MUTE1_PARAM], inputs[CV1_INPUT]);
+		_channels[1] = new MixerChannel(params[LEVEL2_PARAM], params[MUTE2_PARAM], inputs[CV2_INPUT]);
+		_channels[2] = new MixerChannel(params[LEVEL3_PARAM], params[MUTE3_PARAM], inputs[CV3_INPUT]);
+		_channels[3] = new MixerChannel(params[LEVEL4_PARAM], params[MUTE4_PARAM], inputs[CV4_INPUT]);
+		_channels[4] = new MixerChannel(params[LEVEL5_PARAM], params[MUTE5_PARAM], inputs[CV5_INPUT]);
+		_channels[5] = new MixerChannel(params[LEVEL6_PARAM], params[MUTE6_PARAM], inputs[CV6_INPUT]);
+		_channels[6] = new MixerChannel(params[LEVEL7_PARAM], params[MUTE7_PARAM], inputs[CV7_INPUT]);
+		_channels[7] = new MixerChannel(params[LEVEL8_PARAM], params[MUTE8_PARAM], inputs[CV8_INPUT]);
 		sampleRateChange();
 		_rms.setSensitivity(0.05f);
 	}
@@ -134,7 +142,186 @@ struct Mix8 : BGModule {
 	json_t* dataToJson() override;
 	void dataFromJson(json_t* root) override;
 	void sampleRateChange() override;
-	void processChannel(const ProcessArgs& args, int _c) override;
+	void processAll(const ProcessArgs& args) override;
+};
+
+struct Mix8x : ExpanderModule<Mix8ExpanderMessage, Mix8> {
+	enum ParamsIds {
+		LOW1_PARAM,
+		MID1_PARAM,
+		HIGH1_PARAM,
+		A1_PARAM,
+		PRE_A1_PARAM,
+		B1_PARAM,
+		PRE_B1_PARAM,
+		LOW2_PARAM,
+		MID2_PARAM,
+		HIGH2_PARAM,
+		A2_PARAM,
+		PRE_A2_PARAM,
+		B2_PARAM,
+		PRE_B2_PARAM,
+		LOW3_PARAM,
+		MID3_PARAM,
+		HIGH3_PARAM,
+		A3_PARAM,
+		PRE_A3_PARAM,
+		B3_PARAM,
+		PRE_B3_PARAM,
+		LOW4_PARAM,
+		MID4_PARAM,
+		HIGH4_PARAM,
+		A4_PARAM,
+		PRE_A4_PARAM,
+		B4_PARAM,
+		PRE_B4_PARAM,
+		LOW5_PARAM,
+		MID5_PARAM,
+		HIGH5_PARAM,
+		A5_PARAM,
+		PRE_A5_PARAM,
+		B5_PARAM,
+		PRE_B5_PARAM,
+		LOW6_PARAM,
+		MID6_PARAM,
+		HIGH6_PARAM,
+		A6_PARAM,
+		PRE_A6_PARAM,
+		B6_PARAM,
+		PRE_B6_PARAM,
+		LOW7_PARAM,
+		MID7_PARAM,
+		HIGH7_PARAM,
+		A7_PARAM,
+		PRE_A7_PARAM,
+		B7_PARAM,
+		PRE_B7_PARAM,
+		LOW8_PARAM,
+		MID8_PARAM,
+		HIGH8_PARAM,
+		A8_PARAM,
+		PRE_A8_PARAM,
+		B8_PARAM,
+		PRE_B8_PARAM,
+		LEVEL_A_PARAM,
+		LEVEL_B_PARAM,
+		NUM_PARAMS
+	};
+
+	enum InputsIds {
+		A1_INPUT,
+		B1_INPUT,
+		A2_INPUT,
+		B2_INPUT,
+		A3_INPUT,
+		B3_INPUT,
+		A4_INPUT,
+		B4_INPUT,
+		A5_INPUT,
+		B5_INPUT,
+		A6_INPUT,
+		B6_INPUT,
+		A7_INPUT,
+		B7_INPUT,
+		A8_INPUT,
+		B8_INPUT,
+		L_A_INPUT,
+		R_A_INPUT,
+		LEVEL_A_INPUT,
+		L_B_INPUT,
+		R_B_INPUT,
+		NUM_INPUTS
+	};
+
+	enum OutputsIds {
+		SEND_A_OUTPUT,
+		SEND_B_OUTPUT,
+		NUM_OUTPUTS
+	};
+
+	MixerExpanderChannel* _channels[8] {};
+	Saturator _saturatorA, _saturatorB;
+	Amplifier _returnAAmp, _returnBAmp;
+	bogaudio::dsp::SlewLimiter _returnASL, _returnBSL;
+
+	Mix8x() {
+		config(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS);
+		configParam<EQParamQuantity>(LOW1_PARAM, -1.0f, 1.0f, 0.0f, "Channel 1 low", " dB");
+		configParam<EQParamQuantity>(MID1_PARAM, -1.0f, 1.0f, 0.0f, "Channel 1 mid", " dB");
+		configParam<EQParamQuantity>(HIGH1_PARAM, -1.0f, 1.0f, 0.0f, "Channel 1 high", " dB");
+		configParam<AmplifierParamQuantity>(A1_PARAM, 0.0f, 1.0f, 0.0f, "Channel 1 A send");
+		configParam(PRE_A1_PARAM, 0.0f, 1.0f, 0.0f, "Channel 1 A send pre/post");
+		configParam<AmplifierParamQuantity>(B1_PARAM, 0.0f, 1.0f, 0.0f, "Channel 1 B send");
+		configParam(PRE_B1_PARAM, 0.0f, 1.0f, 0.0f, "Channel 1 B send pre/post");
+		configParam<EQParamQuantity>(LOW2_PARAM, -1.0f, 1.0f, 0.0f, "Channel 2 low", " dB");
+		configParam<EQParamQuantity>(MID2_PARAM, -1.0f, 1.0f, 0.0f, "Channel 2 mid", " dB");
+		configParam<EQParamQuantity>(HIGH2_PARAM, -1.0f, 1.0f, 0.0f, "Channel 2 high", " dB");
+		configParam<AmplifierParamQuantity>(A2_PARAM, 0.0f, 1.0f, 0.0f, "Channel 2 A send");
+		configParam(PRE_A2_PARAM, 0.0f, 1.0f, 0.0f, "Channel 2 A send pre/post");
+		configParam<AmplifierParamQuantity>(B2_PARAM, 0.0f, 1.0f, 0.0f, "Channel 2 B send");
+		configParam(PRE_B2_PARAM, 0.0f, 1.0f, 0.0f, "Channel 2 B send pre/post");
+		configParam<EQParamQuantity>(LOW3_PARAM, -1.0f, 1.0f, 0.0f, "Channel 3 low", " dB");
+		configParam<EQParamQuantity>(MID3_PARAM, -1.0f, 1.0f, 0.0f, "Channel 3 mid", " dB");
+		configParam<EQParamQuantity>(HIGH3_PARAM, -1.0f, 1.0f, 0.0f, "Channel 3 high", " dB");
+		configParam<AmplifierParamQuantity>(A3_PARAM, 0.0f, 1.0f, 0.0f, "Channel 3 A send");
+		configParam(PRE_A3_PARAM, 0.0f, 1.0f, 0.0f, "Channel 3 A send pre/post");
+		configParam<AmplifierParamQuantity>(B3_PARAM, 0.0f, 1.0f, 0.0f, "Channel 3 B send");
+		configParam(PRE_B3_PARAM, 0.0f, 1.0f, 0.0f, "Channel 3 B send pre/post");
+		configParam<EQParamQuantity>(LOW4_PARAM, -1.0f, 1.0f, 0.0f, "Channel 4 low", " dB");
+		configParam<EQParamQuantity>(MID4_PARAM, -1.0f, 1.0f, 0.0f, "Channel 4 mid", " dB");
+		configParam<EQParamQuantity>(HIGH4_PARAM, -1.0f, 1.0f, 0.0f, "Channel 4 high", " dB");
+		configParam<AmplifierParamQuantity>(A4_PARAM, 0.0f, 1.0f, 0.0f, "Channel 4 A send");
+		configParam(PRE_A4_PARAM, 0.0f, 1.0f, 0.0f, "Channel 4 A send pre/post");
+		configParam<AmplifierParamQuantity>(B4_PARAM, 0.0f, 1.0f, 0.0f, "Channel 4 B send");
+		configParam(PRE_B4_PARAM, 0.0f, 1.0f, 0.0f, "Channel 4 B send pre/post");
+		configParam<EQParamQuantity>(LOW5_PARAM, -1.0f, 1.0f, 0.0f, "Channel 5 low", " dB");
+		configParam<EQParamQuantity>(MID5_PARAM, -1.0f, 1.0f, 0.0f, "Channel 5 mid", " dB");
+		configParam<EQParamQuantity>(HIGH5_PARAM, -1.0f, 1.0f, 0.0f, "Channel 5 high", " dB");
+		configParam<AmplifierParamQuantity>(A5_PARAM, 0.0f, 1.0f, 0.0f, "Channel 5 A send");
+		configParam(PRE_A5_PARAM, 0.0f, 1.0f, 0.0f, "Channel 5 A send pre/post");
+		configParam<AmplifierParamQuantity>(B5_PARAM, 0.0f, 1.0f, 0.0f, "Channel 5 B send");
+		configParam(PRE_B5_PARAM, 0.0f, 1.0f, 0.0f, "Channel 5 B send pre/post");
+		configParam<EQParamQuantity>(LOW6_PARAM, -1.0f, 1.0f, 0.0f, "Channel 6 low", " dB");
+		configParam<EQParamQuantity>(MID6_PARAM, -1.0f, 1.0f, 0.0f, "Channel 6 mid", " dB");
+		configParam<EQParamQuantity>(HIGH6_PARAM, -1.0f, 1.0f, 0.0f, "Channel 6 high", " dB");
+		configParam<AmplifierParamQuantity>(A6_PARAM, 0.0f, 1.0f, 0.0f, "Channel 6 A send");
+		configParam(PRE_A6_PARAM, 0.0f, 1.0f, 0.0f, "Channel 6 A send pre/post");
+		configParam<AmplifierParamQuantity>(B6_PARAM, 0.0f, 1.0f, 0.0f, "Channel 6 B send");
+		configParam(PRE_B6_PARAM, 0.0f, 1.0f, 0.0f, "Channel 6 B send pre/post");
+		configParam<EQParamQuantity>(LOW7_PARAM, -1.0f, 1.0f, 0.0f, "Channel 7 low", " dB");
+		configParam<EQParamQuantity>(MID7_PARAM, -1.0f, 1.0f, 0.0f, "Channel 7 mid", " dB");
+		configParam<EQParamQuantity>(HIGH7_PARAM, -1.0f, 1.0f, 0.0f, "Channel 7 high", " dB");
+		configParam<AmplifierParamQuantity>(A7_PARAM, 0.0f, 1.0f, 0.0f, "Channel 7 A send");
+		configParam(PRE_A7_PARAM, 0.0f, 1.0f, 0.0f, "Channel 7 A send pre/post");
+		configParam<AmplifierParamQuantity>(B7_PARAM, 0.0f, 1.0f, 0.0f, "Channel 7 B send");
+		configParam(PRE_B7_PARAM, 0.0f, 1.0f, 0.0f, "Channel 7 B send pre/post");
+		configParam<EQParamQuantity>(LOW8_PARAM, -1.0f, 1.0f, 0.0f, "Channel 8 low", " dB");
+		configParam<EQParamQuantity>(MID8_PARAM, -1.0f, 1.0f, 0.0f, "Channel 8 mid", " dB");
+		configParam<EQParamQuantity>(HIGH8_PARAM, -1.0f, 1.0f, 0.0f, "Channel 8 high", " dB");
+		configParam<AmplifierParamQuantity>(A8_PARAM, 0.0f, 1.0f, 0.0f, "Channel 8 A send");
+		configParam(PRE_A8_PARAM, 0.0f, 1.0f, 0.0f, "Channel 8 A send pre/post");
+		configParam<AmplifierParamQuantity>(B8_PARAM, 0.0f, 1.0f, 0.0f, "Channel 8 B send");
+		configParam(PRE_B8_PARAM, 0.0f, 1.0f, 0.0f, "Channel 8 B send pre/post");
+		configParam<AmplifierParamQuantity>(LEVEL_A_PARAM, 0.0f, 1.0f, 0.8f, "A return level");
+		configParam<AmplifierParamQuantity>(LEVEL_B_PARAM, 0.0f, 1.0f, 0.8f, "B return level");
+
+		_channels[0] = new MixerExpanderChannel(params[LOW1_PARAM], params[MID1_PARAM], params[HIGH1_PARAM], params[A1_PARAM], params[B1_PARAM], params[PRE_A1_PARAM], params[PRE_B1_PARAM], inputs[A1_INPUT], inputs[B1_INPUT]);
+		_channels[1] = new MixerExpanderChannel(params[LOW2_PARAM], params[MID2_PARAM], params[HIGH2_PARAM], params[A2_PARAM], params[B2_PARAM], params[PRE_A2_PARAM], params[PRE_B2_PARAM], inputs[A2_INPUT], inputs[B2_INPUT]);
+		_channels[2] = new MixerExpanderChannel(params[LOW3_PARAM], params[MID3_PARAM], params[HIGH3_PARAM], params[A3_PARAM], params[B3_PARAM], params[PRE_A3_PARAM], params[PRE_B3_PARAM], inputs[A3_INPUT], inputs[B3_INPUT]);
+		_channels[3] = new MixerExpanderChannel(params[LOW4_PARAM], params[MID4_PARAM], params[HIGH4_PARAM], params[A4_PARAM], params[B4_PARAM], params[PRE_A4_PARAM], params[PRE_B4_PARAM], inputs[A4_INPUT], inputs[B4_INPUT]);
+		_channels[4] = new MixerExpanderChannel(params[LOW5_PARAM], params[MID5_PARAM], params[HIGH5_PARAM], params[A5_PARAM], params[B5_PARAM], params[PRE_A5_PARAM], params[PRE_B5_PARAM], inputs[A5_INPUT], inputs[B5_INPUT]);
+		_channels[5] = new MixerExpanderChannel(params[LOW6_PARAM], params[MID6_PARAM], params[HIGH6_PARAM], params[A6_PARAM], params[B6_PARAM], params[PRE_A6_PARAM], params[PRE_B6_PARAM], inputs[A6_INPUT], inputs[B6_INPUT]);
+		_channels[6] = new MixerExpanderChannel(params[LOW7_PARAM], params[MID7_PARAM], params[HIGH7_PARAM], params[A7_PARAM], params[B7_PARAM], params[PRE_A7_PARAM], params[PRE_B7_PARAM], inputs[A7_INPUT], inputs[B7_INPUT]);
+		_channels[7] = new MixerExpanderChannel(params[LOW8_PARAM], params[MID8_PARAM], params[HIGH8_PARAM], params[A8_PARAM], params[B8_PARAM], params[PRE_A8_PARAM], params[PRE_B8_PARAM], inputs[A8_INPUT], inputs[B8_INPUT]);
+	}
+	virtual ~Mix8x() {
+		for (int i = 0; i < 8; ++i) {
+			delete _channels[i];
+		}
+	}
+
+	void sampleRateChange() override;
+	void processAll(const ProcessArgs& args) override;
 };
 
 } // namespace bogaudio
diff --git a/src/Mono.hpp b/src/Mono.hpp
@@ -42,7 +42,7 @@ struct Mono : BGModule {
 	Mono() {
 		config(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS);
 		configParam(COMPRESSION_PARAM, 0.0f, 1.0f, 0.2f, "Compression", "", 0.0f, 10.0f);
-		configParam<AmpliferParamQuantity>(LEVEL_PARAM, 0.0f, 1.0f, 1.0f, "Output level");
+		configParam<AmplifierParamQuantity>(LEVEL_PARAM, 0.0f, 1.0f, 1.0f, "Output level");
 	}
 
 	void sampleRateChange() override;
diff --git a/src/Pan.cpp b/src/Pan.cpp
@@ -3,9 +3,10 @@
 #include "mixer.hpp"
 
 void Pan::sampleRateChange() {
+	float sr = APP->engine->getSampleRate();
 	for (int c = 0; c < maxChannels; ++c) {
-		_slew1[c].setParams(APP->engine->getSampleRate(), MixerChannel::panSlewTimeMS, 2.0f);
-		_slew2[c].setParams(APP->engine->getSampleRate(), MixerChannel::panSlewTimeMS, 2.0f);
+		_slew1[c].setParams(sr, MIXER_PAN_SLEW_MS, 2.0f);
+		_slew2[c].setParams(sr, MIXER_PAN_SLEW_MS, 2.0f);
 	}
 }
 
diff --git a/src/TestExpander.hpp b/src/TestExpander.hpp
@@ -8,8 +8,7 @@ extern Model* modelTestExpanderExtension;
 
 namespace bogaudio {
 
-struct TestExpanderMessage : MessageBase {
-	int channels = 0;
+struct TestExpanderMessage : ExpanderMessage {
 	float sample[BGModule::maxChannels] {};
 };
 
diff --git a/src/VCA.hpp b/src/VCA.hpp
@@ -36,7 +36,7 @@ struct VCA : BGModule {
 	Amplifier _amplifier2[maxChannels];
 	bogaudio::dsp::SlewLimiter _levelSL2[maxChannels];
 
-	struct LevelParamQuantity : AmpliferParamQuantity {
+	struct LevelParamQuantity : AmplifierParamQuantity {
 		bool isLinear() override;
 	};
 
diff --git a/src/VCM.hpp b/src/VCM.hpp
@@ -44,7 +44,7 @@ struct VCM : DisableOutputLimitModule {
 	Amplifier _amplifier3[maxChannels];
 	Amplifier _amplifier4[maxChannels];
 
-	struct LevelParamQuantity : AmpliferParamQuantity {
+	struct LevelParamQuantity : AmplifierParamQuantity {
 		bool isLinear() override;
 	};
 
diff --git a/src/bogaudio.cpp b/src/bogaudio.cpp
@@ -126,7 +126,9 @@ void init(rack::Plugin *p) {
 	p->addModel(modelWalk);
 
 	p->addModel(modelMix8);
+	p->addModel(modelMix8x);
 	p->addModel(modelMix4);
+	p->addModel(modelMix4x);
 	p->addModel(modelMix1);
 	p->addModel(modelVCM);
 	p->addModel(modelMute8);
diff --git a/src/expanders.hpp b/src/expanders.hpp
@@ -9,10 +9,10 @@ using namespace rack;
 
 namespace bogaudio {
 
-struct MessageBase {
+struct ExpanderMessage {
 	int channels = 0;
 
-	virtual ~MessageBase() {}
+	virtual ~ExpanderMessage() {}
 };
 
 template<class MSG, class EM>
@@ -20,7 +20,7 @@ struct ExpandableModule : BGModule {
 	MSG _messages[2] {};
 
 	ExpandableModule() {
-		static_assert(std::is_base_of<MessageBase, MSG>::value, "type parameter MSG must derive from MessageBase");
+		static_assert(std::is_base_of<ExpanderMessage, MSG>::value, "type parameter MSG must derive from ExpanderMessage");
 
 		rightExpander.producerMessage = &_messages[0];
 		rightExpander.consumerMessage = &_messages[1];
@@ -59,7 +59,7 @@ struct ExpanderModule : BGModule {
 	MSG _messages[2] {};
 
 	ExpanderModule() {
-		static_assert(std::is_base_of<MessageBase, MSG>::value, "type parameter MSG must derive from MessageBase");
+		static_assert(std::is_base_of<ExpanderMessage, MSG>::value, "type parameter MSG must derive from ExpanderMessage");
 
 		leftExpander.producerMessage = &_messages[0];
 		leftExpander.consumerMessage = &_messages[1];
diff --git a/src/mixer.cpp b/src/mixer.cpp
@@ -4,15 +4,13 @@
 const float MixerChannel::maxDecibels = 6.0f;
 const float MixerChannel::minDecibels = Amplifier::minDecibels;
 const float MixerChannel::levelSlewTimeMS = 5.0f;
-const float MixerChannel::panSlewTimeMS = 10.0f;
 
 void MixerChannel::setSampleRate(float sampleRate) {
 	_levelSL.setParams(sampleRate, levelSlewTimeMS, maxDecibels - minDecibels);
-	_panSL.setParams(sampleRate, panSlewTimeMS, 2.0f);
 	_rms.setSampleRate(sampleRate);
 }
 
-void MixerChannel::next(float sample, bool stereo, bool solo, int c) {
+void MixerChannel::next(float sample, bool solo, int c) {
 	float mute = _muteParam.getValue();
 	if (_muteInput) {
 		mute += clamp(_muteInput->getPolyVoltage(c), 0.0f, 10.0f);
@@ -31,16 +29,50 @@ void MixerChannel::next(float sample, bool stereo, bool solo, int c) {
 		_amplifier.setLevel(_levelSL.next(level));
 	}
 
-	left = right = out = _amplifier.next(sample);
+	out = _amplifier.next(sample);
 	rms = _rms.next(out / 5.0f);
-	if (stereo) {
-		float pan = clamp(_panParam.getValue(), -1.0f, 1.0f);
-		if (_panInput.isConnected()) {
-			pan *= clamp(_panInput.getPolyVoltage(c) / 5.0f, -1.0f, 1.0f);
-		}
-		_panner.setPan(_panSL.next(pan));
-		_panner.next(out, left, right);
+}
+
+
+void MixerExpanderChannel::setSampleRate(float sampleRate) {
+	_sendASL.setParams(sampleRate, MixerChannel::levelSlewTimeMS, MixerChannel::maxDecibels - MixerChannel::minDecibels);
+	_sendBSL.setParams(sampleRate, MixerChannel::levelSlewTimeMS, MixerChannel::maxDecibels - MixerChannel::minDecibels);
+}
+
+float MixerExpanderChannel::knobToDb(Param& p) {
+	float v = clamp(p.getValue(), -1.0f, 1.0f);
+	if (v < 0.0f) {
+		return -v * Equalizer::cutDb;
+	}
+	return v * Equalizer::gainDb;
+}
+
+void MixerExpanderChannel::next(float preFader, float postFader) {
+	_eq.setParams(
+		APP->engine->getSampleRate(),
+		knobToDb(_lowParam),
+		knobToDb(_midParam),
+		knobToDb(_highParam)
+	);
+	postEQ = _eq.next(postFader);
+
+	float level = clamp(_sendAParam.getValue(), 0.0f, 1.0f);
+	if (_sendAInput.isConnected()) {
+		level *= clamp(_sendAInput.getVoltage() / 10.0f, 0.0f, 1.0f);
+	}
+	level = 1.0f - level;
+	level *= Amplifier::minDecibels;
+	_sendAAmp.setLevel(_sendASL.next(level));
+	sendA = _sendAAmp.next(_preAParam.getValue() > 0.5f ? preFader : postEQ);
+
+	level = clamp(_sendBParam.getValue(), 0.0f, 1.0f);
+	if (_sendBInput.isConnected()) {
+		level *= clamp(_sendBInput.getVoltage() / 10.0f, 0.0f, 1.0f);
 	}
+	level = 1.0f - level;
+	level *= Amplifier::minDecibels;
+	_sendBAmp.setLevel(_sendBSL.next(level));
+	sendB = _sendBAmp.next(_preBParam.getValue() > 0.5f ? preFader : postEQ);
 }
 
 
diff --git a/src/mixer.hpp b/src/mixer.hpp
@@ -1,50 +1,52 @@
 #pragma once
 
 #include "bogaudio.hpp"
+#include "expanders.hpp"
+#include "dsp/filter.hpp"
 #include "dsp/signal.hpp"
 
 using namespace bogaudio::dsp;
 
 namespace bogaudio {
 
+#define MIXER_PAN_SLEW_MS 10.0f
+
+template<int N>
+struct MixerExpanderMessage : ExpanderMessage {
+	float preFader[N] {};
+	float postFader[N] {};
+	float postEQ[N] {};
+	float returnA[2] {};
+	float returnB[2] {};
+};
+
 struct MixerChannel {
 	static const float maxDecibels;
 	static const float minDecibels;
 	static const float levelSlewTimeMS;
-	static const float panSlewTimeMS;
 
 	Amplifier _amplifier;
-	Panner _panner;
 	bogaudio::dsp::SlewLimiter _levelSL;
-	bogaudio::dsp::SlewLimiter _panSL;
 	RootMeanSquare _rms;
 
 	Param& _levelParam;
-	Param& _panParam;
 	Param& _muteParam;
 	Input& _levelInput;
-	Input& _panInput;
 	Input* _muteInput;
 
 	float out = 0.0f;
-	float left = 0.0f;
-	float right = 0.0f;
 	float rms = 0.0f;
 
 	MixerChannel(
 		Param& level,
-		Param& pan,
 		Param& mute,
 		Input& levelCv,
-		Input& panCv,
 		float sampleRate = 1000.0f,
 		Input* muteCv = NULL
 	)
 	: _levelParam(level)
-	, _panParam(pan)
 	, _muteParam(mute)
 	, _levelInput(levelCv)
-	, _panInput(panCv)
 	, _muteInput(muteCv)
 	{
 		setSampleRate(sampleRate);
@@ -52,7 +54,58 @@ struct MixerChannel {
 	}
 
 	void setSampleRate(float sampleRate);
-	void next(float sample, bool stereo, bool solo, int c = 0); // outputs on out, left, right, rms.
+	void next(float sample, bool solo, int c = 0); // outputs on members out, rms.
+};
+
+struct MixerExpanderChannel {
+	Equalizer _eq;
+	Amplifier _sendAAmp;
+	Amplifier _sendBAmp;
+	bogaudio::dsp::SlewLimiter _sendASL;
+	bogaudio::dsp::SlewLimiter _sendBSL;
+
+	Param& _lowParam;
+	Param& _midParam;
+	Param& _highParam;
+	Param& _sendAParam;
+	Param& _sendBParam;
+	Param& _preAParam;
+	Param& _preBParam;
+	Input& _sendAInput;
+	Input& _sendBInput;
+
+	float postEQ = 0.0f;
+	float sendA = 0.0f;
+	float sendB = 0.0f;
+
+	MixerExpanderChannel(
+		Param& low,
+		Param& mid,
+		Param& high,
+		Param& sendA,
+		Param& sendB,
+		Param& preA,
+		Param& preB,
+		Input& cvA,
+		Input& cvB,
+		float sampleRate = 1000.0f
+	)
+	: _lowParam(low)
+	, _midParam(mid)
+	, _highParam(high)
+	, _sendAParam(sendA)
+	, _sendBParam(sendB)
+	, _preAParam(preA)
+	, _preBParam(preB)
+	, _sendAInput(cvA)
+	, _sendBInput(cvB)
+	{
+		setSampleRate(sampleRate);
+	}
+
+	void setSampleRate(float sampleRate);
+	float knobToDb(Param& p);
+	void next(float preFader, float postFader); // outputs on members postEQ, sendA, sendB
 };
 
 struct MuteButton : ToggleButton {
diff --git a/src/param_quantities.cpp b/src/param_quantities.cpp
@@ -6,11 +6,11 @@
 using namespace bogaudio;
 using namespace bogaudio::dsp;
 
-bool AmpliferParamQuantity::isLinear() {
+bool AmplifierParamQuantity::isLinear() {
 	return false;
 }
 
-void AmpliferParamQuantity::setUnits(bool linear) {
+void AmplifierParamQuantity::setUnits(bool linear) {
 	if (linear) {
 		unit = "";
 	}
@@ -19,7 +19,7 @@ void AmpliferParamQuantity::setUnits(bool linear) {
 	}
 }
 
-float AmpliferParamQuantity::getDisplayValue() {
+float AmplifierParamQuantity::getDisplayValue() {
 	float v = getValue();
 	if (!module) {
 		return v;
@@ -36,7 +36,7 @@ float AmpliferParamQuantity::getDisplayValue() {
 	return v;
 }
 
-void AmpliferParamQuantity::setDisplayValue(float displayValue) {
+void AmplifierParamQuantity::setDisplayValue(float displayValue) {
 	if (!module) {
 		return;
 	}
diff --git a/src/param_quantities.hpp b/src/param_quantities.hpp
@@ -45,7 +45,7 @@ typedef ScaledSquaringParamQuantity<10> TenXSquaringParamQuantity;
 
 typedef TenXSquaringParamQuantity EnvelopeSegmentParamQuantity;
 
-struct AmpliferParamQuantity : ParamQuantity {
+struct AmplifierParamQuantity : ParamQuantity {
 	virtual bool isLinear();
 	virtual void setUnits(bool linear);
 	float getDisplayValue() override;