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

MicroDexed.ino

@@ -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(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, mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0));
+      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(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, mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0));
+    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] =

UI.hpp

@@ -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 *********