Use the functions below to turn on or off a note
TimeStamp is ignored and can be set to 0
Channel and Velocity are ignored unless you are using advanced instrument modes, they can usually be set to 0
Pitch represents the pitch of note
it uses the MIDI standard for notes
MIDI notes are 0-127
60 is middle C, 61 is one note higher, 59 is one note lower
metalOrchestra.handleNoteOn( TimeStamp, Channel, Velocity, Pitch );
metalOrchestra.handleNoteOff( TimeStamp, Channel, Velocity, Pitch );