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MicroMDAEPiano
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Added inverter for second modulated delay as stereo chorus simulation.

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dev
Holger Wirtz 6 years ago
parent a6f913c888
commit 30267eb805
4 changed files with 30 additions and 29 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 51
      MicroMDAEPiano.ino
  2. 2
      config.h
  3. 2
      effect_modulated_delay.cpp
  4. 4
      effect_modulated_delay.h

51
MicroMDAEPiano.ino
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@ -53,6 +53,7 @@ AudioMixer4 mixer_r;
AudioMixer4 mixer_l;
AudioAmplifier volume_r;
AudioAmplifier volume_l;
AudioAmplifier inverter;
AudioEffectModulatedDelay modchorus_r;
AudioEffectModulatedDelay modchorus_l;
AudioSynthWaveform modulator;
@ -63,24 +64,25 @@ AudioConnection patchCord3(queue_l, freeverb_l);
AudioConnection patchCord4(queue_r, 0, modchorus_r, 0);
AudioConnection patchCord5(queue_l, 0, modchorus_l, 0);
AudioConnection patchCord6(modulator, 0, modchorus_r, 1);
AudioConnection patchCord7(modulator, 0, modchorus_l, 1);
AudioConnection patchCord8(queue_r, 0, mixer_r, 0);
AudioConnection patchCord9(queue_l, 0, mixer_l, 0);
AudioConnection patchCord10(modchorus_r, 0, mixer_r, 2);
AudioConnection patchCord11(modchorus_l, 0, mixer_l, 2);
AudioConnection patchCord12(freeverb_r, 0, mixer_r, 1);
AudioConnection patchCord13(freeverb_l, 0, mixer_l, 1);
AudioConnection patchCord14(mixer_r, volume_r);
AudioConnection patchCord15(mixer_l, volume_l);
AudioConnection patchCord7(modulator, inverter);
AudioConnection patchCord8(inverter, 0, modchorus_l, 1);
AudioConnection patchCord9(queue_r, 0, mixer_r, 0);
AudioConnection patchCord10(queue_l, 0, mixer_l, 0);
AudioConnection patchCord11(modchorus_r, 0, mixer_r, 2);
AudioConnection patchCord12(modchorus_l, 0, mixer_l, 2);
AudioConnection patchCord13(freeverb_r, 0, mixer_r, 1);
AudioConnection patchCord14(freeverb_l, 0, mixer_l, 1);
AudioConnection patchCord15(mixer_r, volume_r);
AudioConnection patchCord16(mixer_l, volume_l);
#if defined(TEENSY_AUDIO_BOARD)
AudioOutputI2S i2s1;
AudioConnection patchCord16(volume_r, 0, i2s1, 0);
AudioConnection patchCord17(volume_l, 0, i2s1, 1);
AudioConnection patchCord17(volume_r, 0, i2s1, 0);
AudioConnection patchCord18(volume_l, 0, i2s1, 1);
AudioControlSGTL5000 sgtl5000_1;
#elif defined(TGA_AUDIO_BOARD)
AudioOutputI2S i2s1;
AudioConnection patchCord16(volume_r, 0, i2s1, 1);
AudioConnection patchCord17(volume_l, 0, i2s1, 0);
AudioConnection patchCord17(volume_r, 0, i2s1, 1);
AudioConnection patchCord18(volume_l, 0, i2s1, 0);
AudioControlWM8731master wm8731_1;
#else
AudioOutputPT8211 pt8211_1;
@ -153,8 +155,8 @@ elapsedMillis cpu_mem_millis;
#endif
// Allocate the delay lines for left and right channels
short l_delayline[CHORUS_DELAY_LENGTH_BYTES];
short r_delayline[CHORUS_DELAY_LENGTH_BYTES];
short l_delayline[CHORUS_DELAY_LENGTH_SAMPLES];
short r_delayline[CHORUS_DELAY_LENGTH_SAMPLES];
//*************************************************************************************************
//* SETUP FUNCTION
@ -226,11 +228,11 @@ void setup()
Serial.print(audio_block_time_us);
Serial.println(F("us)"));
if (!modchorus_r.begin(r_delayline, CHORUS_DELAY_LENGTH_BYTES)) {
if (!modchorus_r.begin(r_delayline, CHORUS_DELAY_LENGTH_SAMPLES)) {
Serial.println(F("AudioEffectModulatedDelay - right channel begin failed"));
while (1);
}
if (!modchorus_l.begin(l_delayline, CHORUS_DELAY_LENGTH_BYTES)) {
if (!modchorus_l.begin(l_delayline, CHORUS_DELAY_LENGTH_SAMPLES)) {
Serial.println(F("AudioEffectModulatedDelay - left channel begin failed"));
while (1);
}
@ -241,16 +243,15 @@ void setup()
modulator.frequency(1.0);
modulator.phase(0);
modulator.offset(0.0);
inverter.gain(-1.0); // change phase for second moduleated delay
// internal mixing of original signal(0), reverb(1) and chorus(2)
//mixer_r.gain(0, 1.0);
//mixer_l.gain(0, 1.0);
mixer_r.gain(0, 0.0);
mixer_l.gain(0, 0.0);
mixer_r.gain(1, 0.0);
mixer_l.gain(1, 0.0);
mixer_r.gain(2, 1.0);
mixer_l.gain(2, 1.0);
mixer_r.gain(0, 1.0);
mixer_l.gain(0, 1.0);
mixer_r.gain(1, 0.5);
mixer_l.gain(1, 0.5);
mixer_r.gain(2, 0.5);
mixer_l.gain(2, 0.5);
// set master volume
set_master_volume(master_volume);

2
config.h
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@ -64,7 +64,7 @@
#define INTERPOLATION_WINDOW_SIZE 7 // use only odd numbers!!!
#define INTERPOLATE QUADRATIC // LINEAR QUADRATIC COSINE CUBIC LAGRANGE
#define CHORUS_WAVEFORM WAVEFORM_SINE // WAVEFORM_SINE WAVEFORM_SAWTOOTH WAVEFORM_SAWTOOTH_REVERSE WAVEFORM_SQUARE WAVEFORM_TRIANGLE
#define CHORUS_DELAY_LENGTH_BYTES (16*AUDIO_BLOCK_SAMPLES)
#define CHORUS_DELAY_LENGTH_SAMPLES (16*AUDIO_BLOCK_SAMPLES)
//*************************************************************************************************
//* DEBUG OUTPUT SETTINGS

2
effect_modulated_delay.cpp
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@ -30,7 +30,7 @@
/******************************************************************/
// Based on; A u d i o E f f e c t C h o r u s
// Based on; A u d i o E f f e c t D e l a y
// Written by Pete (El Supremo) Jan 2014
// 140529 - change to handle mono stream - change modify() to voices()
// 140219 - correct storage class (not static)

4
effect_modulated_delay.h
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@ -27,9 +27,9 @@
#include "Arduino.h"
#include "AudioStream.h"
/******************************************************************/
/*************************************************************************/
// A u d i o E f f e c t C h o r u s
// A u d i o E f f e c t M o d u l a t e d D e l a y
// Written by Pete (El Supremo) Jan 2014
// 140219 - correct storage class (not static)
// 190527 - added modulation input handling (by Holger Wirtz)

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