Several fixes and tests.

MicroDexed.ino

@@ -90,8 +90,8 @@ AudioMixer4                audio_thru_mixer_l;
 #ifdef NUM_DRUMS
 AudioPlaySdRaw*             Drum[NUM_DRUMS];
 AudioEffectMonoStereo*      drum_mono2stereo[NUM_DRUMS];
-AudioMixer8                 drum_mixer_r;
+AudioMixer4                 drum_mixer_r;
-AudioMixer8                 drum_mixer_l;
+AudioMixer4                 drum_mixer_l;
 #endif
 
 // Audio chain tail
@@ -174,6 +174,8 @@ AudioConnection          patchCord24(audio_thru_mixer_l, 0, i2s1, 1);
 #ifdef USE_FX
 AudioConnection          patchCord25(drum_mixer_r, 0, reverb_mixer_r, 4);
 AudioConnection          patchCord26(drum_mixer_l, 0, reverb_mixer_l, 4);
+AudioConnection          patchCord27(drum_mixer_r, 0, master_mixer_r, 2);
+AudioConnection          patchCord28(drum_mixer_l, 0, master_mixer_l, 2);
 #else
 AudioConnection          patchCord25(drum_mixer_r, 0, master_mixer_r, 2);
 AudioConnection          patchCord26(drum_mixer_l, 0, master_mixer_l, 2);
@@ -248,10 +250,6 @@ void create_audio_drum_chain(uint8_t instance_id)
   dynamicDrumConnections[nDrumDynamic++] = new AudioConnection(*Drum[instance_id], 0, *drum_mono2stereo[instance_id], 0);
   dynamicDrumConnections[nDrumDynamic++] = new AudioConnection(*drum_mono2stereo[instance_id], 0, drum_mixer_r, instance_id);
   dynamicDrumConnections[nDrumDynamic++] = new AudioConnection(*drum_mono2stereo[instance_id], 1, drum_mixer_l, instance_id);
-
-  drum_mono2stereo[instance_id]->panorama(0.0);
-  drum_mixer_r.gain(instance_id, 1.0);
-  drum_mixer_l.gain(instance_id, 1.0);
 }
 #endif
 
@@ -446,6 +444,9 @@ void setup()
     Serial.println(instance_id, DEC);
 #endif
     create_audio_drum_chain(instance_id);
+
+    drum_mixer_r.gain(instance_id, 1.0);
+    drum_mixer_l.gain(instance_id, 1.0);
   }
 #endif
 
@@ -709,44 +710,64 @@ void handleNoteOn(byte inChannel, byte inNumber, byte inVelocity)
   }
 
 #ifdef NUM_DRUMS
+  static uint8_t drum_counter;
+
   // Check for Drum
   if (inChannel == DRUM_MIDI_CHANNEL)
   {
+    if (drum_counter >= NUM_DRUMS)
+      drum_counter = 0;
+
 #ifdef DEBUG
-    Serial.print(F("Drum "));
+    char note_name[4];
-    Serial.println(inNumber - 48, DEC);
+    getNoteName(note_name, inNumber);
+    Serial.print(F("=> Drum["));
+    Serial.print(drum_counter, DEC);
+    Serial.print(F("]: "));
+    Serial.println(note_name);
 #endif
+
     switch (inNumber - 48)
     {
       case 0:
-        Drum[0]->play("drm/bd01.raw");
+        Drum[drum_counter % 4]->play("/DRM/BD01.RAW");
+        drum_counter++;
         break;
       case 1:
-        Drum[1]->play("drm/cp02.raw");
+        Drum[drum_counter % 4]->play("/drm/cp02.raw");
+        drum_counter++;
         break;
       case 2:
-        Drum[2]->play("drm/sd15.raw");
+        Drum[drum_counter % 4]->play("/drm/sd15.raw");
+        drum_counter++;
         break;
       case 6:
-        Drum[3]->play("drm/hh01.wav");
+        Drum[drum_counter % 4]->play("/drm/hh01.wav");
+        drum_counter++;
         break;
       case 8:
-        Drum[3]->play("drm/hh02.wav");
+        Drum[drum_counter % 4]->play("/drm/hh02.wav");
+        drum_counter++;
         break;
       case 10:
-        Drum[3]->play("drm/oh02.wav");
+        Drum[drum_counter % 4]->play("/drm/oh02.wav");
+        drum_counter++;
         break;
       case 5:
-        Drum[4]->play("drm/lt01.raw");
+        Drum[drum_counter % 4]->play("/drm/lt01.raw");
+        drum_counter++;
         break;
       case 7:
-        Drum[5]->play("drm/ht01.raw");
+        Drum[drum_counter % 4]->play("/drm/ht01.raw");
+        drum_counter++;
         break;
       case 13:
-        Drum[6]->play("drm/rd01.raw");
+        Drum[drum_counter % 4]->play("/drm/rd01.raw");
+        drum_counter++;
         break;
       case 15:
-        Drum[7]->play("drm/rd02.raw");
+        Drum[drum_counter % 4]->play("/drm/rd02.raw");
+        drum_counter++;
         break;
     }
   }

config.h

@@ -109,7 +109,7 @@
 #define USE_FX 1
 
 // NUMBER OF SAMPLEDRUMS
-#define NUM_DRUMS 8 // Max is currently 8!
+#define NUM_DRUMS 4
 #define DRUM_MIDI_CHANNEL 1
 
 // CHORUS parameters
@@ -120,7 +120,7 @@
 // SGTL5000
 #ifdef TEENSY_AUDIO_BOARD
 #define SGTL5000_AUDIO_ENHANCE 1
-//#define SGTL5000_AUDIO_THRU 1
+#define SGTL5000_AUDIO_THRU 1
 #define SGTL5000_HEADPHONE_VOLUME 0.8
 #endif
 #if defined(TEENSY4)
@@ -148,20 +148,12 @@
 //* AUDIO SOFTWARE SETTINGS
 //*************************************************************************************************
 #define SAMPLE_RATE 44100
+
 #ifdef USE_FX
-#ifdef NUM_DRUMS
+#define AUDIO_MEM SAMPLE_RATE * NUM_DEXED * DELAY_MAX_TIME / 128000 + 36
-#define AUDIO_MEM (SAMPLE_RATE * NUM_DEXED * DELAY_MAX_TIME / 128000 + 36) + NUM_DRUMS * 3
-#else
-// #define AUDIO_MEM 380 // T_4.1, 2 Instances, 0.5ms delay
-#define AUDIO_MEM (SAMPLE_RATE * NUM_DEXED * DELAY_MAX_TIME / 128000 + 36)
-#endif
-#else
-#ifdef NUM_DRUMS
-#define AUDIO_MEM NUM_DEXED * 15 + NUM_DRUMS * 3
 #else
 #define AUDIO_MEM NUM_DEXED * 15
 #endif
-#endif
 
 #ifdef TEENSY_AUDIO_BOARD
 /*

effect_auto_pan.cpp

@@ -36,7 +36,12 @@ void AudioEffectAutoPan::update(void)
   audio_block_t *out[2];
 
   in = receiveReadOnly(0);
+  if (!in)
+    return;
+
   mod = receiveReadOnly(1);
+  if (!mod)
+    return;
     
   out[0] = allocate();
   out[1] = allocate();

effect_modulated_delay.cpp

@@ -77,7 +77,12 @@ void AudioEffectModulatedDelay::update(void)
     return;
 
   block = receiveWritable(0);
+  if (!block)
+    return;
+
   modulation = receiveReadOnly(1);
+  if (!modulation)
+    return;
 
   if (block && modulation)
   {

effect_mono_stereo.cpp

@@ -49,6 +49,8 @@ void AudioEffectMonoStereo::update(void)
   audio_block_t *out[2];
 
   in = receiveReadOnly(0);
+  if (!in)
+    return;
 
   out[0] = allocate();
   out[1] = allocate();

effect_stereo_mono.cpp

@@ -39,7 +39,12 @@ void AudioEffectStereoMono::update(void)
   audio_block_t *block[2];
 
   block[0] = receiveWritable(0);
+  if (!block[0])
+    return;
+
   block[1] = receiveWritable(1);
+  if (!block[1])
+    return;
 
   if (_enabled == false)
   {