int sensorPin = A0;
int sensorValue = 0;

int channel = 0 // this is the midi channel 

void setup() {
Serial.begin(9600);
}

void loop() {
midiNoteOn(0,127); // turn note ZERO at pitch 127 (max)
delay(1000);
midiNoteOff(0); // turn off note ZERO
delay(1000);
}


void midiNoteOn(byte note, byte midiVelocity)
{
Serial.write(144 + channel); //NOTE_ON_CMD (its base + channel # starting at ZERO!)
Serial.write(note);
Serial.write(midiVelocity);
}
void midiNoteOff(byte note, byte midiVelocity)
{
Serial.write(128 + channel); // NOTE_OFF_CMD (its base + channel # starting at ZERO!)
Serial.write(note);
Serial.write(midiVelocity);
}