Added USE_F32 for switching to float precission (not working yet).

MicroMDAEPiano.ino

@@ -22,7 +22,11 @@
 */
 
 #include "config.h"
+#ifdef USE_F32
+#include <OpenAudio_ArduinoLibrary.h> //for AudioConvert_I16toF32, AudioConvert_F32toI16, and AudioEffectGain_F32
+#else
 #include <Audio.h>
+#endif
 #include <Wire.h>
 #include <SPI.h>
 #include <MIDI.h>
@@ -43,7 +47,6 @@
 #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
@@ -54,31 +57,55 @@ Encoder enc1(ENC1_PIN_A, ENC1_PIN_B);
 Bounce but1 = Bounce(BUT1_PIN, 10);  // 10 ms debounce
 
 // GUItool: begin automatically generated code
+#ifdef USE_F32
 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;
+#else
+AudioPlayQueue       queue_r;         //xy=494,404
+AudioPlayQueue       queue_l;         //xy=494,404
+#endif
 AudioAnalyzePeak         peak_r;          //xy=695,491
 AudioAnalyzePeak         peak_l;          //xy=695,491
+#ifdef USE_F32
+#ifdef USE_COMP_F32
+AudioEffectCompressor_F32 comp_r;
+AudioEffectCompressor_F32 comp_l;
 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);
+#else
+AudioConnection_F32      patchCord0(queue_r, float2Int_r);
+AudioConnection_F32      patchCord1(queue_l, float2Int_l);
+#endif
+#endif
 #ifdef TEENSY_AUDIO_BOARD
 AudioOutputI2S           i2s1;           //xy=1072,364
+#ifdef USE_F32
 AudioConnection          patchCord4(float2Int_r, peak_r);
 AudioConnection          patchCord5(float2Int_l, peak_l);
 AudioConnection          patchCord6(float2Int_r, 0, i2s1, 0);
 AudioConnection          patchCord7(float2Int_l, 0, i2s1, 1);
+#else
+AudioConnection          patchCord4(queue_r, peak_r);
+AudioConnection          patchCord5(queue_l, peak_l);
+AudioConnection          patchCord6(queue_r, 0, i2s1, 0);
+AudioConnection          patchCord7(queue_l, 0, i2s1, 1);
+#endif
 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
+#ifdef USE_F32
 AudioConnection          patchCord4(float2Int_r, volume_r);
 AudioConnection          patchCord5(float2Int_l, volume_l);
+#else
+AudioConnection          patchCord4(queue_r, volume_r);
+AudioConnection          patchCord5(queue_l, volume_l);
+#endif
 AudioConnection          patchCord6(volume_r, peak_r);
 AudioConnection          patchCord7(volume_l, peak_l);
 AudioConnection          patchCord8(volume_r, 0, pt8211_1, 1);
@@ -91,6 +118,7 @@ uint8_t midi_channel = DEFAULT_MIDI_CHANNEL;
 uint32_t xrun = 0;
 uint32_t overload = 0;
 uint32_t peak = 0;
+uint32_t audio_buffer_problem = 0;
 uint16_t render_time_max = 0;
 float vol = VOLUME;
 float vol_right = 1.0;
@@ -173,7 +201,9 @@ void setup()
 
   // start audio card
   AudioMemory(AUDIO_MEM);
+#ifdef USE_F32
   AudioMemory_F32(AUDIO_MEM_F32);
+#endif
 
 #ifdef TEENSY_AUDIO_BOARD
   sgtl5000_1.enable();
@@ -185,7 +215,8 @@ void setup()
   sgtl5000_1.volume(1.0, 1.0);
 #endif
 
-  set_volume(vol, vol_left, vol_right);
+  //set_volume(vol, vol_left, vol_right);
+  set_volume(1.0, 1.0, 1.0);
 
 #if defined (DEBUG) && defined (SHOW_CPU_LOAD_MSEC)
   // Initialize processor and memory measurements
@@ -215,10 +246,14 @@ void setup()
 
   // DECAY,RELEASE,HARDNESS,TREBLE,PAN_TREM,LFO_RATE,VELOCITY_SENSE,STEREO,MAX_POLY,TUNE,DETUNE,OVERDRIVE
 
+#if defined(USE_F32) && defined(USE_COMP_F32)
   // 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);
+  comp_r.setPreGain_dB(0.0);
+  comp_l.setPreGain_dB(0.0);
+#endif
 
   Serial.println(F("<setup end>"));
 
@@ -230,8 +265,13 @@ void setup()
 
 void loop()
 {
+#if defined(USE_F32)
   float* audio_buffer_r; // pointer to AUDIO_BLOCK_SAMPLES * sizeof(float)
   float* audio_buffer_l; // pointer to AUDIO_BLOCK_SAMPLES * sizeof(float)
+#else
+  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)
+#endif
   const uint16_t audio_block_time_ms = 1000000 / (SAMPLE_RATE / AUDIO_BLOCK_SAMPLES);
 
   // Main sound calculation
@@ -239,9 +279,6 @@ void loop()
   {
     fill_audio_buffer = 0;
 
-    audio_buffer_r = queue_r.getBuffer();
-    audio_buffer_l = queue_l.getBuffer();
-
 #if defined (DEBUG) && defined (SHOW_CPU_LOAD_MSEC)
     if (cpu_mem_millis > SHOW_CPU_LOAD_MSEC)
     {
@@ -289,10 +326,15 @@ void loop()
     queue_r.playBuffer();
     queue_l.playBuffer();
   }
+  else
+  {
+    audio_buffer_problem++;
+  }
 
   handle_input();
 }
 
+#if defined(USE_F32) && defined(USE_COMP_F32)
 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);
@@ -303,6 +345,7 @@ void setup_compressor(boolean use_HP_filter, float knee_dBFS, float comp_ratio,
   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);
 }
+#endif
 
 void handle_input(void)
 {
@@ -536,6 +579,8 @@ void show_cpu_and_mem_usage(void)
   Serial.print(overload, DEC);
   Serial.print(F("   PEAK: "));
   Serial.print(peak, DEC);
+  Serial.print(F("   AUDIO_BUF_ERR: "));
+  Serial.print(audio_buffer_problem, DEC);
   Serial.println();
   AudioProcessorUsageMaxReset();
   AudioMemoryUsageMaxReset();

config.h

@@ -31,12 +31,12 @@
 //#define TEENSY_AUDIO_BOARD 1
 #define VOLUME 0.8
 #define DEFAULT_MIDI_CHANNEL MIDI_CHANNEL_OMNI
-#define AUDIO_MEM 300
+#define AUDIO_MEM 16
-#define AUDIO_MEM_F32 10
+#define AUDIO_MEM_F32 16
 #define SAMPLE_RATE 44100
-#define REDUCE_LOUDNESS 0
+#define REDUCE_LOUDNESS 1
 #define USE_XFADE_DATA 1
-
+//#define USE_COMP_F32 1
 #if !defined(__MK66FX1M0__) // check for Teensy-3.6
 #undef USE_ONBOARD_USB_HOST
 #define NVOICES 32

mdaEPiano.cpp

@@ -194,7 +194,11 @@ float mdaEPiano::getParameter(int32_t index)     {
   return programs[curProgram].param[index];
 }
 
+#ifdef USE_F32
 void mdaEPiano::process(float* outputs_r, float* outputs_l)
+#else
+void mdaEPiano::process(int16_t* outputs_r, int16_t* outputs_l)
+#endif
 {
   int16_t v;
   float x, l, r, od = overdrive;
@@ -237,8 +241,13 @@ void mdaEPiano::process(float *outputs_r, float *outputs_l)
     l += l * lmod * lfo1;
     r += r * rmod * lfo1;  //worth making all these local variables?
 
+#ifdef USE_F32
     outputs_l[frame] += l;
     outputs_r[frame] += r;
+#else
+    outputs_l[frame] = static_cast<int16_t>(l * 0x7fff) >> REDUCE_LOUDNESS;
+    outputs_r[frame] = static_cast<int16_t>(r * 0x7fff) >> REDUCE_LOUDNESS;
+#endif
   }
 
   if (fabs(tl) < 1.0e-10) tl = 0.0f; //anti-denormal

mdaEPiano.h

@@ -79,7 +79,11 @@ public:
     mdaEPiano(); // mdaEPiano(audioMasterCallback audioMaster);
     ~mdaEPiano();
 
+#ifdef USE_F32
     virtual void process(float *outputs_r, float *outputs_l);
+#else
+    virtual void process(int16_t *outputs_r, int16_t *outputs_l);
+#endif
     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);