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MicroDexed
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Using cross-fade for chorus mix-in to avoid digital saturation.

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pull/32/head
Holger Wirtz 4 years ago
parent aa8ed261d7
commit cfa0462e4e
2 changed files with 15 additions and 5 deletions
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  1. 16
      MicroDexed.ino
  2. 4
      UI.hpp

16
MicroDexed.ino
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@ -1354,8 +1354,8 @@ void initial_values_from_eeprom(bool init)
MicroDexed[instance_id]->doRefreshVoice();
#if defined(USE_FX)
chorus_mixer[instance_id]->gain(0, 1.0);
chorus_mixer[instance_id]->gain(1, mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0));
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));
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 +1654,8 @@ 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);
chorus_mixer[instance_id]->gain(1, mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0));
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));
switch (configuration.fx.chorus_waveform[instance_id])
{
case 0:
@ -1738,6 +1738,14 @@ void _softRestart(void)
SCB_AIRCR = 0x05FA0004; //write value for restart
}
float pseudo_log_curve(float value, bool type)
{
if (type == true)
return (_pseudo_log * arm_sin_f32(value));
else
return (_pseudo_log * arm_cos_f32(value));
}
uint32_t crc32(byte * calc_start, uint16_t calc_bytes) // base code from https://www.arduino.cc/en/Tutorial/EEPROMCrc
{
const uint32_t crc_table[16] =

4
UI.hpp
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@ -56,6 +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);
#ifdef DISPLAY_LCD_SPI
extern void change_disp_sd(bool d);
@ -1139,7 +1140,8 @@ 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(1, mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0));
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));
}
if (LCDML.FUNC_close()) // ****** STABLE END *********

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