commit ba8d4ea83a668289d1a55d67148c0de1c389dbd5 parent e91a7bb916ae494f0e39df6e192ad55c9974c6c3 Author: Olav Sørensen <olav.sorensen@live.no> Date: Tue, 20 Sep 2022 00:01:06 +0200 Windowed-sinc interpolator changes Diffstat:
| M | src/ft2_header.h | | | 2 | +- |
| M | src/mixer/ft2_windowed_sinc.h | | | 10 | +++++----- |
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/src/ft2_header.h b/src/ft2_header.h @@ -12,7 +12,7 @@ #endif #include "ft2_replayer.h" -#define PROG_VER_STR "1.57" +#define PROG_VER_STR "1.58" // do NOT change these! It will only mess things up... diff --git a/src/mixer/ft2_windowed_sinc.h b/src/mixer/ft2_windowed_sinc.h @@ -4,16 +4,16 @@ #include <stdbool.h> #include "ft2_mix.h" -// 8 or 16. 8 should only be used if the code is too slow for the target system. -#define SINC_TAPS 16 +// 8 or 16. 8 allows more unwanted frequencies, which may be preferred for lo-fi samples +#define SINC_TAPS 8 // log2(SINC_TAPS) -#define SINC_TAPS_BITS 4 +#define SINC_TAPS_BITS 3 -#define SINC_PHASES 16384 +#define SINC_PHASES 8192 // log2(SINC_PHASES) -#define SINC_PHASES_BITS 14 +#define SINC_PHASES_BITS 13 #define SINC_LUT_LEN (SINC_TAPS * SINC_PHASES) #define SINC_FSHIFT (MIXER_FRAC_BITS-(SINC_PHASES_BITS+SINC_TAPS_BITS))