MIDI Note Input

MEMLNaut-PAF-IML.ino

@@ -1,4 +1,5 @@
 // #include "src/memllib/interface/InterfaceBase.hpp"
+#include "src/memllib/interface/MIDIInOut.hpp"
 #include "display.hpp"
 #include "src/memllib/audio/AudioAppBase.hpp"
 #include "src/memllib/audio/AudioDriver.hpp"
@@ -32,6 +33,9 @@ uint32_t get_rosc_entropy_seed(int bits) {
 // Global objects
 std::shared_ptr<InterfaceRL> APP_SRAM RLInterface;
 
+std::shared_ptr<MIDIInOut> APP_SRAM midi_interf;
+
+
 std::shared_ptr<PAFSynthAudioApp> __scratch_y("audio") audio_app;
 
 // Inter-core communication
@@ -41,6 +45,7 @@ volatile bool APP_SRAM serial_ready = false;
 volatile bool APP_SRAM interface_ready = false;
 
 
+
 // We're only bound to the joystick inputs (x, y, rotate)
 constexpr size_t kN_InputParams = 3;
 
@@ -87,6 +92,22 @@ void setup()
     RLInterface->bind_RL_interface(scr);
     Serial.println("Bound RL interface to MEMLNaut.");
 
+    midi_interf = std::make_shared<MIDIInOut>();
+    midi_interf->Setup(0);
+    midi_interf->SetMIDISendChannel(1);
+    Serial.println("MIDI setup complete.");
+    if (midi_interf) {
+        midi_interf->SetNoteCallback([RLInterface] (bool noteon, uint8_t note_number, uint8_t vel_value) {
+        if (noteon) {
+            uint8_t midimsg[2] = {note_number, vel_value };
+            queue_try_add(&audio_app->qMIDINoteOn, &midimsg);   
+        }
+            Serial.printf("MIDI Note %d: %d\n", note_number, vel_value);
+        });
+        Serial.println("MIDI note callback set.");
+    }
+
+
 
     WRITE_VOLATILE(core_0_ready, true);
     while (!READ_VOLATILE(core_1_ready)) {
@@ -115,6 +136,7 @@ void loop()
         // Un-blink LED
         digitalWrite(33, LOW);
     }
+    midi_interf->Poll();
     delay(10); // Add a small delay to avoid flooding the serial output
 }
 

PAFSynthAudioApp.cpp

@@ -23,10 +23,10 @@ stereosample_t PAFSynthAudioApp::Process(const stereosample_t x)
 
     // const float trig = pulse.square(1);
 
-    paf0.play(x1, 1, arpFreq, arpFreq + (paf0_cf * arpFreq), paf0_bw * arpFreq, paf0_vib, paf0_vfr, paf0_shift, 0);
+    paf0.play(x1, 1, baseFreq, baseFreq + (paf0_cf * baseFreq), paf0_bw * baseFreq, paf0_vib, paf0_vfr, paf0_shift, 0);
     float y = x1[0];
 
-    const float freq1 = arpFreq * detune;
+    const float freq1 = baseFreq * detune;
 
     paf1.play(x1, 1, freq1, freq1 + (paf1_cf * freq1), paf1_bw * freq1, paf1_vib, paf1_vfr, paf1_shift, 1);
     y += x1[0];
@@ -36,18 +36,20 @@ stereosample_t PAFSynthAudioApp::Process(const stereosample_t x)
     paf2.play(x1, 1, freq2, freq2 + (paf2_cf * freq2), paf2_bw * freq2, paf2_vib, paf2_vfr, paf2_shift, 1);
     y += x1[0];
 
-    const float ph = phasorOsc.phasor(1);
-    const bool euclidNewNote = euclidean(ph, 12, euclidN, 0, 0.1f);
+    // const float ph = phasorOsc.phasor(1);
+    // const bool euclidNewNote = euclidean(ph, 12, euclidN, 0, 0.1f);
     // y = y * 0.3f;
     // const float envamp = env.play(counter==0);
     // const float envamp = line.play(counter==0);
-    if(zxdetect.onZX(euclidNewNote)) {
-        envamp=0.2f;
-        freqIndex++;
-        if(freqIndex >= 4) {
-            freqIndex = 0;
-        }
-        arpFreq = frequencies[freqIndex];
+    if(newNote) {
+    // if(zxdetect.onZX(euclidNewNote)) {
+        newNote = false;
+        envamp=0.8f;
+        // freqIndex++;
+        // if(freqIndex >= 4) {
+        //     freqIndex = 0;
+        // }
+        // arpFreq = frequencies[freqIndex];
    }else{
         constexpr float envdec = 0.2f/9000.f;
         envamp -= envdec;
@@ -71,6 +73,8 @@ stereosample_t PAFSynthAudioApp::Process(const stereosample_t x)
     //     Serial.println(envamp);
     // })
 
+    y *= noteVel;
+
     float d1 = (dl1.play(y, 3500, 0.8f) * dl1mix);
     // float d2 = (dl2.play(y, 15000, 0.8f) * dl2mix);
     y = y + d1;// + d2;
@@ -83,6 +87,8 @@ void PAFSynthAudioApp::Setup(float sample_rate, std::shared_ptr<InterfaceBase> i
 {
     AudioAppBase::Setup(sample_rate, interface);
     maxiSettings::sampleRate = sample_rate;
+
+
     paf0.init();
     paf0.setsr(maxiSettings::getSampleRate(), 1);
     // paf0.freq(100, 0);
@@ -118,10 +124,32 @@ void PAFSynthAudioApp::Setup(float sample_rate, std::shared_ptr<InterfaceBase> i
     // line.prepare(1.f,0.f,100.f,false);
     // line.triggerEnable(true);
     envamp=1.f;
+
+    queue_init(&qMIDINoteOn, sizeof(uint8_t)*2, 1);
+
 }
 
+float mtof(uint8_t note) {
+    // Convert MIDI note to frequency
+    return 440.0f * powf(2.0f, (note - 69) / 12.0f);
+}
+
+void PAFSynthAudioApp::loop(){
+    AudioAppBase::loop();
+    uint8_t midimsg[2];
+    if (firstParamsReceived && queue_try_remove(&qMIDINoteOn, &midimsg)) {
+        // Serial.printf("PAFSynthAudioApp::ProcessParams - Received MIDI Note On: %d, Velocity: %d\n", midimsg[0], midimsg[1]);
+        baseFreq = mtof(midimsg[0]);
+        noteVel = midimsg[1] / 127.0f; // Normalize velocity to [0, 1]
+        noteVel = noteVel * noteVel; // Square the velocity for more pronounced effect
+        newNote = true;
+    }
+}
+
+
 void PAFSynthAudioApp::ProcessParams(const std::vector<float>& params)
 {
+    firstParamsReceived = true;
     // // Map parameters to the synth
     // synth_.mapParameters(params);
     // //Serial.print("Params processed.");

PAFSynthAudioApp.hpp

@@ -31,6 +31,9 @@ public:
 
     void ProcessParams(const std::vector<float>& params) override;
 
+    queue_t qMIDINoteOn, qMIDINoteOff;
+
+    void loop() override; 
 protected:
 
     maxiPAFOperator paf0;
@@ -79,7 +82,7 @@ protected:
     float arpFreq=50;
 
     maxiLine line;
-    float envamp;
+    float envamp=0.f;
 
     float detune = 1.0;
 
@@ -88,6 +91,11 @@ protected:
 
     size_t euclidN=4;
 
+    float baseFreq = 50.0f; // Base frequency for the synth
+    bool newNote=false;
+    float noteVel = 0.f;
+    bool firstParamsReceived = false;
+
 };
 
 #endif  // __PAF_SYNTH_AUDIO_APP_HPP__