Fixing play mode to "last priority played" and kliing oldest notes at the end of available free sound generators.

Fixing wrong setting of polyphony at startup.

MicroDexed.ino

@@ -1381,6 +1381,8 @@ void initial_values_from_eeprom(bool init)
       MicroDexed[instance_id]->controllers.refresh();
       MicroDexed[instance_id]->setOPs(configuration.dexed[instance_id].op_enabled);
       MicroDexed[instance_id]->doRefreshVoice();
+      MicroDexed[instance_id]->setOPs(configuration.dexed[instance_id].op_enabled);
+      MicroDexed[instance_id]->setMaxNotes(configuration.dexed[instance_id].polyphony);
       
 #if defined(USE_FX)
       //chorus_mixer[instance_id]->gain(0, 1.0 - pseudo_log_curve(mapfloat(configuration.fx.chorus_level[instance_id], CHORUS_LEVEL_MIN, CHORUS_LEVEL_MAX, 0.0, 1.0), true));
@@ -1400,7 +1402,7 @@ void initial_values_from_eeprom(bool init)
       reverb_mixer_r.gain(instance_id, configuration.fx.reverb_send[instance_id] / 100.0);
       reverb_mixer_l.gain(instance_id, configuration.fx.reverb_send[instance_id] / 100.0);
 #endif
-      MicroDexed[instance_id]->setOPs(configuration.dexed[instance_id].op_enabled);
+
       dexed_level[instance_id]->gain(mapfloat(configuration.dexed[instance_id].sound_intensity, SOUND_INTENSITY_MIN, SOUND_INTENSITY_MAX, 0.0, SOUND_INTENSITY_AMP_MAX));
     }
 

UI.hpp

@@ -1927,15 +1927,15 @@ void UI_func_polyphony(uint8_t param)
 
     if (poly_instance_id == 0)
     {
+      MicroDexed[0]->setMaxNotes(configuration.dexed[0].polyphony);
       sprintf(poly_value_string, "%2d", configuration.dexed[0].polyphony);
       lcd.show(1, 3, 2, poly_value_string);
-      MicroDexed[0]->setMaxNotes(configuration.dexed[0].polyphony);
     }
     else
     {
+      MicroDexed[1]->setMaxNotes(configuration.dexed[1].polyphony);
       sprintf(poly_value_string, "%2d", configuration.dexed[1].polyphony);
       lcd.show(1, 13, 2, poly_value_string);
-      MicroDexed[1]->setMaxNotes(configuration.dexed[1].polyphony);
     }
   }
 

dexed.cpp

@@ -67,6 +67,7 @@ Dexed::Dexed(int rate)
     voices[i].keydown = false;
     voices[i].sustained = false;
     voices[i].live = false;
+    voices[i].key_pressed_timer = 0;
   }
 
   max_notes = MAX_NOTES;
@@ -115,9 +116,6 @@ void Dexed::getSamples(uint16_t n_samples, int16_t* buffer)
   uint8_t note;
   float sumbuf[n_samples];
 
-  if (max_notes == 0)
-    return;
-
   if (refreshVoice)
   {
     for (i = 0; i < max_notes; i++)
@@ -198,13 +196,37 @@ void Dexed::keydown(int16_t pitch, uint8_t velo) {
         voices[i].sustained = sustain;
         voices[i].live = true;
         voices[i].dx7_note->init(data, pitch, velo, pitch, porta, &controllers);
+        voices[i].key_pressed_timer = millis();
         return;
       }
     }
   }
 
-  for (uint8_t i = 0; i < max_notes; i++)
+  for (uint8_t i = 0; i <= max_notes; i++)
   {
+    if (i == max_notes)
+    {
+      uint32_t min_timer = 0xffff;
+
+      if (monoMode)
+        break;
+
+      // no free sound slot found, so use the oldest note slot
+      for (uint8_t n = 0; n < max_notes; n++)
+      {
+        if (voices[n].key_pressed_timer < min_timer)
+        {
+          min_timer = voices[n].key_pressed_timer;
+          note = n;
+        }
+      }
+      voices[note].keydown = false;
+      voices[note].sustained = false;
+      voices[note].live = false;
+      voices[note].key_pressed_timer = 0;
+      keydown_counter--;
+    }
+
     if (!voices[note].keydown)
     {
       currentNote = (note + 1) % max_notes;
@@ -216,6 +238,8 @@ void Dexed::keydown(int16_t pitch, uint8_t velo) {
       voices[note].dx7_note->init(data, pitch, velo, srcnote, porta, &controllers);
       if ( data[136] )
         voices[note].dx7_note->oscSync();
+      voices[i].key_pressed_timer = millis();
+      keydown_counter++;
       break;
     }
     else
@@ -225,6 +249,7 @@ void Dexed::keydown(int16_t pitch, uint8_t velo) {
     note = (note + 1) % max_notes;
   }
 
+
   if (keydown_counter == 0)
     lfo.keydown();
 
@@ -254,6 +279,8 @@ void Dexed::keyup(int16_t pitch) {
   if (pitch < 0) // for disabling the oldest note when cpu overload is detected
   {
     voices[currentNote].keydown = false;
+    voices[currentNote].key_pressed_timer = 0;
+
     if (--max_notes == currentNote)
       currentNote = 0;
   }
@@ -266,6 +293,8 @@ void Dexed::keyup(int16_t pitch) {
     for (note = 0; note < max_notes; note++) {
       if ( voices[note].midi_note == pitch && voices[note].keydown ) {
         voices[note].keydown = false;
+        voices[note].key_pressed_timer = 0;
+
         break;
       }
     }
@@ -287,6 +316,7 @@ void Dexed::keyup(int16_t pitch) {
 
       if ( highNote != -1 && voices[note].live ) {
         voices[note].live = false;
+        voices[note].key_pressed_timer = 0;
         voices[target].live = true;
         voices[target].dx7_note->transferState(*voices[note].dx7_note);
       }
@@ -412,7 +442,7 @@ void Dexed::setMaxNotes(uint8_t n) {
   {
     notesOff();
     max_notes = n;
-    panic();
+    //panic();
     controllers.refresh();
   }
 }

dexed.h

@@ -52,6 +52,7 @@ struct ProcessorVoice {
   bool keydown;
   bool sustained;
   bool live;
+  uint32_t key_pressed_timer;
   Dx7Note *dx7_note;
 };
 

source_microdexed.h

@@ -11,6 +11,10 @@ class AudioSourceMicroDexed : public AudioStream, public Dexed {
     uint16_t render_time_max = 0;
     AudioSourceMicroDexed(int sample_rate) : AudioStream(0, NULL), Dexed(sample_rate) { };
     void update(void) {
+
+      if (max_notes == 0)
+        return;
+
       if (in_update) {
         xrun++;
         return;