Fixed T_3.6 config. I had to go down to single engine with 8 voices (and FX) or 16 voices (without FX).

MicroDexed.ino

@@ -45,7 +45,7 @@
 
 // Audio engines
 AudioSynthDexed*     MicroDexed[NUM_DEXED];
-AudioEffectDynamics*  compressor[NUM_DEXED];
+AudioEffectDynamics*  dynamics[NUM_DEXED];
 
 #if defined(USE_FX)
 AudioSynthWaveform*        chorus_modulator[NUM_DEXED];
@@ -59,8 +59,6 @@ AudioEffectDelay*          delay_fx[NUM_DEXED];
 AudioMixer4*               delay_mixer[NUM_DEXED];
 #endif
 AudioEffectMonoStereo*     mono2stereo[NUM_DEXED];
-AudioEffectDynamics        limiter_r;
-AudioEffectDynamics        limiter_l;
 
 AudioMixer4                microdexed_peak_mixer;
 AudioAnalyzePeak           microdexed_peak;
@@ -157,16 +155,12 @@ AudioConnection          patchCord18(stereo2mono, 1, usb1, 1);
 
 #if defined(TEENSY_AUDIO_BOARD) && defined(SGTL5000_AUDIO_THRU)
 AudioInputI2S            i2s1in;
-//AudioConnection          patchCord19(stereo2mono, 0, audio_thru_mixer_r, 0);
+AudioConnection          patchCord19(stereo2mono, 0, audio_thru_mixer_r, 0);
-//AudioConnection          patchCord20(stereo2mono, 1, audio_thru_mixer_l, 0);
+AudioConnection          patchCord20(stereo2mono, 1, audio_thru_mixer_l, 0);
-AudioConnection          patchCord19(stereo2mono, 0, limiter_r, 0);
+AudioConnection          patchCord21(i2s1in, 0, audio_thru_mixer_r, 1);
-AudioConnection          patchCord20(stereo2mono, 1, limiter_l, 0);
+AudioConnection          patchCord22(i2s1in, 1, audio_thru_mixer_l, 1);
-AudioConnection          patchCord21(limiter_r, 0, audio_thru_mixer_r, 0);
+AudioConnection          patchCord23(audio_thru_mixer_r, 0, i2s1, 0);
-AudioConnection          patchCord22(limiter_l, 0, audio_thru_mixer_l, 0);
+AudioConnection          patchCord24(audio_thru_mixer_l, 0, i2s1, 1);
-AudioConnection          patchCord23(i2s1in, 0, audio_thru_mixer_r, 1);
-AudioConnection          patchCord24(i2s1in, 1, audio_thru_mixer_l, 1);
-AudioConnection          patchCord25(audio_thru_mixer_r, 0, i2s1, 0);
-AudioConnection          patchCord26(audio_thru_mixer_l, 0, i2s1, 1);
 #endif
 
 //
@@ -183,7 +177,7 @@ AudioConnection * dynamicConnections[NUM_DEXED * 5];
 void create_audio_engine_chain(uint8_t instance_id)
 {
   MicroDexed[instance_id] = new AudioSynthDexed(MAX_NOTES / NUM_DEXED, SAMPLE_RATE);
-  compressor[instance_id] = new AudioEffectDynamics();
+  dynamics[instance_id] = new AudioEffectDynamics();
   mono2stereo[instance_id] = new AudioEffectMonoStereo();
 #if defined(USE_FX)
   chorus_modulator[instance_id] = new AudioSynthWaveform();
@@ -197,8 +191,8 @@ void create_audio_engine_chain(uint8_t instance_id)
   delay_mixer[instance_id] = new AudioMixer4();
 #endif
 
-  dynamicConnections[nDynamic++] = new AudioConnection(*MicroDexed[instance_id], 0, *compressor[instance_id], 0);
+  dynamicConnections[nDynamic++] = new AudioConnection(*MicroDexed[instance_id], 0, *dynamics[instance_id], 0);
-  dynamicConnections[nDynamic++] = new AudioConnection(*compressor[instance_id], 0, microdexed_peak_mixer, instance_id);
+  dynamicConnections[nDynamic++] = new AudioConnection(*dynamics[instance_id], 0, microdexed_peak_mixer, instance_id);
 
 #if defined(USE_FX)
   dynamicConnections[nDynamic++] = new AudioConnection(*MicroDexed[instance_id], 0, *chorus_mixer[instance_id], 0);
@@ -525,11 +519,6 @@ void setup()
   audio_thru_mixer_l.gain(3, 0.0);
 #endif
 
-#if defined(LIMIT_THRESHOLD)
-  limiter_r.limit(LIMIT_THRESHOLD, LIMIT_ATTACK, LIMIT_RELEASE);
-  limiter_l.limit(LIMIT_THRESHOLD, LIMIT_ATTACK, LIMIT_RELEASE);
-#endif
-
 #ifdef DEBUG
   Serial.println(F("<setup end>"));
 #endif
@@ -1886,10 +1875,13 @@ void set_fx_params(void)
 #if defined(USE_FX)
   for (uint8_t instance_id = 0; instance_id < NUM_DEXED; instance_id++)
   {
-    // COMPRESSOR     THRESHOLD,ATTACK,RELEASE,RATIO,KNEE_WIDTH
+    // COMPRESSOR
+#if defined(LIMIT_THRESHOLD)
+    dynamics[instance_id]->limit(LIMIT_THRESHOLD, LIMIT_ATTACK, LIMIT_RELEASE);
+#endif
 #if defined(COMP_THRESHOLD)
-    compressor[instance_id]->compression(COMP_THRESHOLD, COMP_ATTACK, COMP_RELEASE, COMP_RATIO, COMP_KNEE_WIDTH);
+    dynamics[instance_id]->compression(COMP_THRESHOLD, COMP_ATTACK, COMP_RELEASE, COMP_RATIO, COMP_KNEE_WIDTH);
-    compressor[instance_id]->makeupGain(COMP_MAKEUPGAIN);
+    dynamics[instance_id]->makeupGain(COMP_MAKEUPGAIN);
 #endif
 
     // CHORUS

config.h

@@ -99,9 +99,15 @@
 //* DEXED AND EFFECTS SETTINGS
 //*************************************************************************************************
 // Number of Dexed instances
+#if defined(TEENSY3_6)
+#define NUM_DEXED 1 // 1 or 2 - nothing else!
+#else
 #define NUM_DEXED 2 // 1 or 2 - nothing else!
+#endif
+
 // FX-CHAIN ENABLE/DISABLE
 #define USE_FX 1
+
 // COMPRESSOR/ LIMITER
 #define COMP_THRESHOLD -20.0
 #define COMP_ATTACK 0.2
@@ -109,9 +115,9 @@
 #define COMP_RATIO 2.0
 #define COMP_KNEE_WIDTH 1.0
 #define COMP_MAKEUPGAIN 1.0
-#define LIMIT_THRESHOLD -3.0
+#define LIMIT_THRESHOLD -1.0
 #define LIMIT_ATTACK 0.03
-#define LIMIT_RELEASE 0.7
+#define LIMIT_RELEASE 0.2
 
 // CHORUS parameters
 #define MOD_DELAY_SAMPLE_BUFFER int32_t(TIME_MS2SAMPLES(20.0)) // 20.0 ms delay buffer. 
@@ -312,33 +318,27 @@
 // Teensy-3.6 settings
 #if defined(TEENSY3_6)
 # if defined(USE_FX)
+#    warning >>> With enabled FX only maximum of 8 voices is possible
+#    define MAX_NOTES 8
+# else
 #   if F_CPU == 256000000
+#    warning >>> Maximum of 16 voices.
 #    define MAX_NOTES 16
 #   elif F_CPU == 240000000
+#    warning >>> Maximum of 14 voices. You should consider to use 256MHz overclocking to get a maximum of 16 voices
 #    define MAX_NOTES 14
 #   elif F_CPU == 216000000
+#    warning >>> Maximum of 12 voices. You should consider to use 256MHz overclocking to get a maximum of 16 voices
 #    define MAX_NOTES 12
 #   else
-#    warning >>> You should consider to use 256MHz overclocking to get polyphony of 16 voices <<<
+#    warning >>> Maximum of 10 voices. You should consider to use 256MHz overclocking to get a maximum of 16 voices
 #    define MAX_NOTES 10
 #   endif
-# else
-#   if F_CPU == 256000000
-#    define MAX_NOTES 18
-#   elif F_CPU == 240000000
-#    define MAX_NOTES 16
-#   elif F_CPU == 216000000
-#    define MAX_NOTES 15
-#   else
-#    define MAX_NOTES 12
-#   endif
 # endif
 #endif
 
 #ifdef TEENSY3_5
-#undef MIDI_DEVICE_USB_HOST
+#error >>> Not supported anymore!!!
-#define MAX_NOTES 11
-#undef USE_FX
 #endif
 
 // MIDI