midi cc

MIDI Output

From that post, here's how to send playnote messages over MIDI using the Arduino:

 // Variables: 
 byte note = 0;            // The MIDI note value to be played

 void setup() {
   //  Set MIDI baud rate:
   Serial.begin(31250);
 }

 void loop() {
   // play notes from F#-0 (30) to F#-5 (90):
   for (note = 30; note < 90; note ++) {
     //Note on channel 1 (0x90), some note value (note), middle velocity (0x45):
     noteOn(0x90, note, 0x45);
     delay(100);
     //Note on channel 1 (0x90), some note value (note), silent velocity (0x00):
     noteOn(0x90, note, 0x00);   
     delay(100);
   }
 }

 //  plays a MIDI note.  Doesn't check to see that
 //  cmd is greater than 127, or that data values are  less than 127:
 void noteOn(byte cmd, byte data1, byte data2) {
   Serial.print(cmd, BYTE);
   Serial.print(data1, BYTE);
   Serial.print(data2, BYTE);
 }