3.5

214MainStage Effects
In MainStage, this code example converts modulation events into note events and provides
a slider to determine note lengths.
• Text following /* shows comments that explain the JavaScript code.
var PluginParameters = [{name:"Note Length", minValue:0, maxValue: 100,
unit:"%"}]; /* create a slider (default range 0 - 100) */
function HandleMIDI(event) {
if(event instanceof ControlChange && event.number == 1) { /* if event is
MIDI cc1 (modwheel) */
var note = new NoteOn; /* create a NoteOn object */
if(event.value == 0)
/* because modwheel range is 0-127 and pitch range is 1-127, convert a
modwheel value of 0 to 1 */
event.value = 1;
note.pitch = event.value; /* use cc value as note pitch */
note.velocity = 100; /* use velocity 100 */
note.send(); /* send note on */
var off = new NoteOff(note); /* create a NoteOff object that inherits the
NoteOn pitch and velocity values */
var delayInBeats = GetParameter("Note Length")/100 + 0.1;
/* retrieve the parameter value of the slider you created (add 0.1 to
guarantee note on and off are not simultaneous) */
off.sendAfterBeats(delayInBeats); /* send note off after the length in
beats is set via the slider */
}
}
MainStage Transposer MIDI plug-in
The Transposer MIDI plug-in can transpose incoming MIDI notes in real time and can
correct notes to a selected scale.