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MicroDexed
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Small fixes.

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Enabled crossfade between half-chorus and half-normal signal.
Enabled chorus modulation output filter.
pull/32/head
Holger Wirtz 4 years ago
parent cfa0462e4e
commit 2ca049b29e
3 changed files with 19 additions and 13 deletions
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  1. 17
      MicroDexed.ino
  2. 9
      UI.hpp
  3. 6
      config.h

17
MicroDexed.ino
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@ -207,7 +207,6 @@ char sd_string[LCD_cols + 1];
char g_voice_name[NUM_DEXED][VOICE_NAME_LEN];
char g_bank_name[NUM_DEXED][BANK_NAME_LEN];
char receive_bank_filename[FILENAME_LEN];
const float _pseudo_log = 1048575 / (float)(1 << 20);
#if defined(USE_FX)
// Allocate the delay lines for chorus
@ -1354,8 +1353,10 @@ void initial_values_from_eeprom(bool init)
MicroDexed[instance_id]->doRefreshVoice();
#if defined(USE_FX)
chorus_mixer[instance_id]->gain(0, 1.0 - pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
chorus_mixer[instance_id]->gain(1, pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
//chorus_mixer[instance_id]->gain(0, 1.0 - pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
//chorus_mixer[instance_id]->gain(1, pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
chorus_mixer[instance_id]->gain(0, 1.0 - mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 0.5));
chorus_mixer[instance_id]->gain(1, mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 0.5));
delay_mixer[instance_id]->gain(0, 1.0);
delay_mixer[instance_id]->gain(1, mapfloat(configuration.fx.delay_level[instance_id], DELAY_LEVEL_MIN, DELAY_LEVEL_MAX, 0.0, 1.0));
delay_fb_mixer[instance_id]->gain(0, 1.0);
@ -1654,8 +1655,10 @@ void set_fx_params(void)
for (uint8_t instance_id = 0; instance_id < NUM_DEXED; instance_id++)
{
// CHORUS
chorus_mixer[instance_id]->gain(0, 1.0 - pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
chorus_mixer[instance_id]->gain(1, pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
//chorus_mixer[instance_id]->gain(0, 1.0 - pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
//chorus_mixer[instance_id]->gain(1, pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
chorus_mixer[instance_id]->gain(0, 1.0 - mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 0.5));
chorus_mixer[instance_id]->gain(1, mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 0.5));
switch (configuration.fx.chorus_waveform[instance_id])
{
case 0:
@ -1673,7 +1676,7 @@ void set_fx_params(void)
chorus_modulator[instance_id]->offset(0.0);
#if MOD_FILTER_OUTPUT == MOD_BUTTERWORTH_FILTER_OUTPUT
// Butterworth filter, 12 db/octave
modchorus_filter[instance_id].setLowpass(0, MOD_FILTER_CUTOFF_HZ, 0.707);
modchorus_filter[instance_id]->setLowpass(0, MOD_FILTER_CUTOFF_HZ, 0.707);
#elif MOD_FILTER_OUTPUT == MOD_LINKWITZ_RILEY_FILTER_OUTPUT
// Linkwitz-Riley filter, 48 dB/octave
modchorus_filter[instance_id]->setLowpass(0, MOD_FILTER_CUTOFF_HZ, 0.54);
@ -1740,6 +1743,8 @@ void _softRestart(void)
float pseudo_log_curve(float value, bool type)
{
const float _pseudo_log = 1048575 / (float)(1 << 20);
if (type == true)
return (_pseudo_log * arm_sin_f32(value));
else

9
UI.hpp
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@ -56,7 +56,7 @@ extern void eeprom_update_sys(void);
extern void eeprom_update_performance(void);
extern void eeprom_update_fx(void);
extern void eeprom_update_dexed(uint8_t instance_id);
extern float pseudo_log_curve(float value, bool type);
//extern float pseudo_log_curve(float value, bool type);
#ifdef DISPLAY_LCD_SPI
extern void change_disp_sd(bool d);
@ -92,7 +92,6 @@ extern char sd_string[LCD_cols + 1];
extern char g_voice_name[NUM_DEXED][VOICE_NAME_LEN];
extern char g_bank_name[NUM_DEXED][BANK_NAME_LEN];
extern char receive_bank_filename[FILENAME_LEN];
extern const float _pseudo_log;
/***********************************************************************
GLOBAL
@ -1140,8 +1139,10 @@ void UI_func_chorus_level(uint8_t param)
lcd_display_bar_int("Chorus Lvl.", configuration.fx.chorus_level[instance_id], 1.0, CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 3, false, false, false, false);
chorus_mixer[instance_id]->gain(0, 1.0 - pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
chorus_mixer[instance_id]->gain(1, pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
//chorus_mixer[instance_id]->gain(0, 1.0 - pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
//chorus_mixer[instance_id]->gain(1, pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
chorus_mixer[instance_id]->gain(0, 1.0 - mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 0.5));
chorus_mixer[instance_id]->gain(1, mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 0.5));
}
if (LCDML.FUNC_close()) // ****** STABLE END *********

6
config.h
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@ -80,7 +80,7 @@
//*************************************************************************************************
//* DEBUG OUTPUT SETTINGS
//*************************************************************************************************
#define DEBUG 1
//#define DEBUG 1
#define SERIAL_SPEED 230400
#define SHOW_XRUN 1
#define SHOW_CPU_LOAD_MSEC 5000
@ -93,8 +93,8 @@
// CHORUS parameters
#define MOD_DELAY_SAMPLE_BUFFER int32_t(TIME_MS2SAMPLES(20.0)) // 20.0 ms delay buffer.
#define MOD_WAVEFORM WAVEFORM_TRIANGLE // WAVEFORM_SINE WAVEFORM_TRIANGLE WAVEFORM_SAWTOOTH WAVEFORM_SAWTOOTH_REVERSE
#define MOD_FILTER_OUTPUT MOD_NO_FILTER_OUTPUT // MOD_LINKWITZ_RILEY_FILTER_OUTPUT MOD_BUTTERWORTH_FILTER_OUTPUT MOD_NO_FILTER_OUTPUT
#define MOD_FILTER_CUTOFF_HZ 3000
#define MOD_FILTER_OUTPUT MOD_BUTTERWORTH_FILTER_OUTPUT // MOD_LINKWITZ_RILEY_FILTER_OUTPUT MOD_BUTTERWORTH_FILTER_OUTPUT MOD_NO_FILTER_OUTPUT
#define MOD_FILTER_CUTOFF_HZ 15
// FX-CHAIN ENABLE/DISABLE
#define USE_FX 1

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