BogaudioModules

commit d6a8c142d0c9c3fe2493ec1b0416b7c9d8ad7cc8
parent 2f0584a2ddafbf452298f0083caa2bcecf654bcd
Author: Matt Demanett <matt@demanett.net>
Date:   Mon,  9 Mar 2020 23:09:47 -0400

Fix problem with ADSR dsp where abrupt parameter changes could produce very large outputs. #103

Diffstat:
M
src/dsp/envelope.cpp
 | 
6
+++---

1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/src/dsp/envelope.cpp b/src/dsp/envelope.cpp
@@ -125,13 +125,13 @@ float ADSR::_next() {
 		}
 		case ATTACK_STAGE: {
 			_stageProgress += _sampleTime;
-			_envelope = _stageProgress / _attack;
+			_envelope = std::max(1.0f, _stageProgress / _attack);
 			_envelope = powf(_envelope, _attackShape);
 			break;
 		}
 		case DECAY_STAGE: {
 			_stageProgress += _sampleTime;
-			_envelope = _stageProgress / _decay;
+			_envelope = std::max(1.0f, _stageProgress / _decay);
 			_envelope = powf(_envelope, _decayShape);
 			_envelope *= 1.0f - _sustain;
 			_envelope = 1.0f - _envelope;
@@ -143,7 +143,7 @@ float ADSR::_next() {
 		}
 		case RELEASE_STAGE: {
 			_stageProgress += _sampleTime;
-			_envelope = _stageProgress / _release;
+			_envelope = std::max(1.0f, _stageProgress / _release);
 			_envelope = powf(_envelope, _releaseShape);
 			_envelope *= _releaseLevel;
 			_envelope = _releaseLevel - _envelope;