Midi monophonic AfterTouch message problem

Other Hardware Audio
1

Hi!
I'm trying to build a simple laser harp with Arduino Leonardo and 8 laser and photoresistors.

An IR sensor (TL1838) allows to control notes and scales with my phone and an ultrasonic module (HC-SR04) controls the pitchbend and, i'm trying, the aftertouch when the distance is lower than 4cm.

I'm using the arduino MIDI library by FortySevenEffects but I don't understand how to use the MonoPhonic AfterTouch message (that applies to all notes)..

MonoPhonic AfterTouch function is described here

And here is my code for the HC-SR04 (with the NewPing library):

    unsigned int uS = sonar.ping();
    Dist = uS / US_ROUNDTRIP_CM;
    
    if(Dist!=oldDist){
      oldDist=Dist;
      //Serial.println(Dist);
      if(Dist>4){
        pitch = map(Dist,5,50,-8192,8191);
        MIDI.sendPitchBend(pitch, 1);
        oldDist=Dist;
      }
      if(Dist==0) MIDI.sendPitchBend(0, 1);
      if((Dist<=4)&&(Dist!=0)){
        MIDI.sendAfterTouch(127, 1);
        MIDI.sendPitchBend(0, 1);
      }
    }

The PitchBend works pretty well but the AfterTouch don't and I have no idea how to fix this..

The complete program is in the attachments

Any help appreciated, thanks a lot!
(and sorry for my bad english, I'm italian)

Midi_IR.ino (5.15 KB)

2

Many MIDI sound generators do not implement after touch, check that yours does.