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MicroMDAEPiano
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Added FP-Audio library and a F32-compressor.

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master
Holger Wirtz 6 years ago
parent 869c832bee
commit 34feff5a8f
4 changed files with 49 additions and 22 deletions
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  1. 62
      MicroMDAEPiano.ino
  2. 1
      config.h
  3. 6
      mdaEPiano.cpp
  4. 2
      mdaEPiano.h

62
MicroMDAEPiano.ino
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@ -3,7 +3,7 @@
MicroMDAEPiano is a port of the MDA-EPiano sound engine
(https://sourceforge.net/projects/mda-vst/) for the Teensy-3.5/3.6 with audio shield.
(c)2019 H. Wirtz <wirtz@parasitstudio.de>
This program is free software; you can redistribute it and/or modify
@ -43,6 +43,7 @@
#include <Bounce.h>
#include <Encoder.h>
#include "LiquidCrystalPlus_I2C.h"
#include <OpenAudio_ArduinoLibrary.h> //for AudioConvert_I16toF32, AudioConvert_F32toI16, and AudioEffectGain_F32
// [I2C] SCL: Pin 19, SDA: Pin 18 (https://www.pjrc.com/teensy/td_libs_Wire.html)
#define LCD_I2C_ADDRESS 0x27
@ -53,27 +54,35 @@ Encoder enc1(ENC1_PIN_A, ENC1_PIN_B);
Bounce but1 = Bounce(BUT1_PIN, 10); // 10 ms debounce
// GUItool: begin automatically generated code
AudioPlayQueue queue_r; //xy=494,404
AudioPlayQueue queue_l; //xy=494,404
AudioPlayQueue_F32 queue_r; //xy=494,404
AudioPlayQueue_F32 queue_l; //xy=494,404
AudioEffectCompressor_F32 comp_r;
AudioEffectCompressor_F32 comp_l;
AudioConvert_F32toI16 float2Int_r;
AudioConvert_F32toI16 float2Int_l;
AudioAnalyzePeak peak_r; //xy=695,491
AudioAnalyzePeak peak_l; //xy=695,491
AudioConnection patchCord0(queue_l, peak_l);
AudioConnection patchCord1(queue_r, peak_r);
AudioConnection_F32 patchCord0(queue_r, comp_r);
AudioConnection_F32 patchCord1(queue_l, comp_l);
AudioConnection_F32 patchCord2(comp_r, float2Int_r);
AudioConnection_F32 patchCord3(comp_l, float2Int_l);
AudioConnection patchCord4(float2Int_r, peak_r);
AudioConnection patchCord5(float2Int_l, peak_l);
#ifdef TEENSY_AUDIO_BOARD
AudioOutputI2S i2s1; //xy=1072,364
AudioConnection patchCord2(queue_l, 0, i2s1, 0);
AudioConnection patchCord3(queue_r, 0, i2s1, 1);
AudioConnection patchCord6(float2Int_r, 0, i2s1, 0);
AudioConnection patchCord7(float2Int_l, 0, i2s1, 1);
AudioControlSGTL5000 sgtl5000_1; //xy=700,536
#else
AudioOutputPT8211 pt8211_1; //xy=1079,320
AudioAmplifier volume_r; //xy=818,370
AudioAmplifier volume_l; //xy=818,411
AudioConnection patchCord2(queue_l, volume_r);
AudioConnection patchCord3(queue_r, volume_l);
AudioConnection patchCord4(volume_r, peak_r);
AudioConnection patchCord5(volume_l, peak_l);
AudioConnection patchCord6(volume_r, 0, pt8211_1, 1);
AudioConnection patchCord7(volume_l, 0, pt8211_1, 0);
AudioConnection patchCord6(float2Int_r, volume_r);
AudioConnection patchCord7(float2Int_l, volume_l);
AudioConnection patchCord8(volume_r, peak_r);
AudioConnection patchCord9(volume_l, peak_l);
AudioConnection patchCord10(volume_r, 0, pt8211_1, 1);
AudioConnection patchCord11(volume_l, 0, pt8211_1, 0);
#endif
// GUItool: end automatically generated code
@ -164,6 +173,7 @@ void setup()
// start audio card
AudioMemory(AUDIO_MEM);
AudioMemory_F32(AUDIO_MEM_F32);
#ifdef TEENSY_AUDIO_BOARD
sgtl5000_1.enable();
@ -205,6 +215,11 @@ void setup()
// DECAY,RELEASE,HARDNESS,TREBLE,PAN_TREM,LFO_RATE,VELOCITY_SENSE,STEREO,MAX_POLY,TUNE,DETUNE,OVERDRIVE
// setup compressor as limiter
setup_compressor(true, -15.0f, 5.0f, 0.005f, 0.200f);
// setup compressor like an automatic volume control
//setup_compressor(true,-50.0,5.0,1.0,2.0);
Serial.println(F("<setup end>"));
#if defined (DEBUG) && defined (SHOW_CPU_LOAD_MSEC)
@ -215,8 +230,8 @@ void setup()
void loop()
{
int16_t* audio_buffer_r; // pointer to AUDIO_BLOCK_SAMPLES * sizeof(int16_t)
int16_t* audio_buffer_l; // pointer to AUDIO_BLOCK_SAMPLES * sizeof(int16_t)
float* audio_buffer_r; // pointer to AUDIO_BLOCK_SAMPLES * sizeof(float)
float* audio_buffer_l; // pointer to AUDIO_BLOCK_SAMPLES * sizeof(float)
const uint16_t audio_block_time_ms = 1000000 / (SAMPLE_RATE / AUDIO_BLOCK_SAMPLES);
// Main sound calculation
@ -255,12 +270,12 @@ void loop()
render_time_max = t2;
if (peak_r.available())
{
if (peak_r.read() > 0.99)
if (peak_r.read() > 1.00)
peak++;
}
if (peak_l.available())
{
if (peak_l.read() > 0.99)
if (peak_l.read() > 1.00)
peak++;
}
@ -278,6 +293,17 @@ void loop()
handle_input();
}
void setup_compressor(boolean use_HP_filter, float knee_dBFS, float comp_ratio, float attack_sec, float release_sec)
{
comp_r.enableHPFilter(use_HP_filter); comp_l.enableHPFilter(use_HP_filter);
comp_r.setThresh_dBFS(knee_dBFS); comp_l.setThresh_dBFS(knee_dBFS);
comp_r.setCompressionRatio(comp_ratio); comp_l.setCompressionRatio(comp_ratio);
float fs_Hz = AUDIO_SAMPLE_RATE;
comp_r.setAttack_sec(attack_sec, fs_Hz); comp_l.setAttack_sec(attack_sec, fs_Hz);
comp_r.setRelease_sec(release_sec, fs_Hz); comp_l.setRelease_sec(release_sec, fs_Hz);
}
void handle_input(void)
{
#ifdef USE_ONBOARD_USB_HOST
@ -315,7 +341,7 @@ void handle_input(void)
if (but1.update())
;
// place handling of encoder and showing values on lcd here
}
#ifdef DEBUG

1
config.h
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@ -32,6 +32,7 @@
#define VOLUME 0.8
#define DEFAULT_MIDI_CHANNEL MIDI_CHANNEL_OMNI
#define AUDIO_MEM 300
#define AUDIO_MEM_F32 10
#define SAMPLE_RATE 44100
#define REDUCE_LOUDNESS 0
#define USE_XFADE_DATA 1

6
mdaEPiano.cpp
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@ -194,7 +194,7 @@ float mdaEPiano::getParameter(int32_t index) {
return programs[curProgram].param[index];
}
void mdaEPiano::process(int16_t *outputs_r, int16_t *outputs_l)
void mdaEPiano::process(float *outputs_r, float *outputs_l)
{
int16_t v;
float x, l, r, od = overdrive;
@ -237,8 +237,8 @@ void mdaEPiano::process(int16_t *outputs_r, int16_t *outputs_l)
l += l * lmod * lfo1;
r += r * rmod * lfo1; //worth making all these local variables?
outputs_l[frame] += static_cast<int16_t>((l * 0.5) * 0x7fff);
outputs_r[frame] += static_cast<int16_t>((r * 0.5) * 0x7fff);
outputs_l[frame] += l;
outputs_r[frame] += r;
}
if (fabs(tl) < 1.0e-10) tl = 0.0f; //anti-denormal

2
mdaEPiano.h
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@ -79,7 +79,7 @@ public:
mdaEPiano(); // mdaEPiano(audioMasterCallback audioMaster);
~mdaEPiano();
virtual void process(int16_t *outputs_r, int16_t *outputs_l);
virtual void process(float *outputs_r, float *outputs_l);
virtual bool processMidiMessage(uint8_t type, uint8_t data1, uint8_t data2);
virtual void setProgram(int32_t program);
virtual void setParameter(int32_t index, float value);

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