public void StartPlayNoteNumber(int noteNum)
{
uint onVelocity = 127;
uint noteCommand = (int)MIDIMessage.NoteOn << 4 | 0;
var result = samplerUnit.MusicDeviceMIDIEvent(noteCommand, (uint)noteNum, onVelocity, 0);
if (result != AudioUnitStatus.NoError)
{
Console.WriteLine("Unable to start playing the mid note. Error code: {0}", (int)result);
}
}
void MidiMessageReceived(object sender, MidiPacketsEventArgs midiPacketArgs)
{
var packets = midiPacketArgs.Packets;
for (int i = 0; i < packets.Length; i++)
{
var packet = packets [i];
byte[] data = new byte[packet.Length];
Marshal.Copy(packet.Bytes, data, 0, packet.Length);
var midiStatus = data [0];
var midiCommand = midiStatus >> 4;
if (midiCommand == 0x09)
{
var note = data [1] & 0x7F;
var velocity = data [2] & 0x7F;
int noteNumber = ((int)note) % 12;
string noteType;
switch (noteNumber)
{
case 0:
noteType = "C";
break;
case 1:
noteType = "C#";
break;
case 2:
noteType = "D";
break;
case 3:
noteType = "D#";
break;
case 4:
noteType = "E";
break;
case 5:
noteType = "F";
break;
case 6:
noteType = "F#";
break;
case 7:
noteType = "G";
break;
case 8:
noteType = "G#";
break;
case 9:
noteType = "A";
break;
case 10:
noteType = "Bb";
break;
case 11:
noteType = "B";
break;
default:
throw new NotImplementedException();
}
samplerUnit.MusicDeviceMIDIEvent((uint)midiStatus, (uint)note, (uint)velocity);
label.InvokeOnMainThread(delegate {
label.Text = String.Format("Playing: {0}: {1}", noteType, noteNumber);
});
}
}
}