MusicSequence iOS 9 bug

gistfile1.txt

    MusicTrack musicTrack1;
    MusicTrack musicTrack2;
    MusicTrack musicTrack3;
    MusicTrack musicTrack4;
    MusicSequence musicSequence;
    MusicPlayer musicPlayer;
    
    NewMusicSequence(&musicSequence);
    NewMusicPlayer(&musicPlayer);
    MusicPlayerSetSequence(musicPlayer, musicSequence);
    MusicSequenceNewTrack(musicSequence, &musicTrack1);
    MusicSequenceNewTrack(musicSequence, &musicTrack2);
    MusicSequenceNewTrack(musicSequence, &musicTrack3);
    MusicSequenceNewTrack(musicSequence, &musicTrack4);
    
    MusicSequenceSetSequenceType(musicSequence, kMusicSequenceType_Beats);
    
    MusicTimeStamp trackLength = 32;
    UInt32 trackLengthSize = sizeof(MusicTimeStamp);
    MusicTrackSetProperty(musicTrack1, kSequenceTrackProperty_TrackLength, &trackLength, trackLengthSize);
    MusicTrackSetProperty(musicTrack2, kSequenceTrackProperty_TrackLength, &trackLength, trackLengthSize);
    MusicTrackSetProperty(musicTrack3, kSequenceTrackProperty_TrackLength, &trackLength, trackLengthSize);
    MusicTrackSetProperty(musicTrack4, kSequenceTrackProperty_TrackLength, &trackLength, trackLengthSize);
    
    //Make it loop forever
    MusicTrackLoopInfo loopInfo;
    loopInfo.loopDuration = trackLength;
    loopInfo.numberOfLoops = 0;
    MusicTrackSetProperty(musicTrack1, kSequenceTrackProperty_LoopInfo, &loopInfo, sizeof(kSequenceTrackProperty_LoopInfo));
    MusicTrackSetProperty(musicTrack2, kSequenceTrackProperty_LoopInfo, &loopInfo, sizeof(kSequenceTrackProperty_LoopInfo));
    MusicTrackSetProperty(musicTrack3, kSequenceTrackProperty_LoopInfo, &loopInfo, sizeof(kSequenceTrackProperty_LoopInfo));
    MusicTrackSetProperty(musicTrack4, kSequenceTrackProperty_LoopInfo, &loopInfo, sizeof(kSequenceTrackProperty_LoopInfo));
    
    //Add Notes
    for(int i = 0; i < 4; i++) {
        MIDINoteMessage noteMessage;
        noteMessage.channel = 0;
        noteMessage.note = 66 + i;
        noteMessage.velocity = 127;
        noteMessage.releaseVelocity = 0;
        noteMessage.duration = 3.0;
        MusicTimeStamp timestamp = i * 4;
        MusicTrackNewMIDINoteEvent(musicTrack1, timestamp, &noteMessage);
    }
    
    for(int i = 0; i < 4; i++) {
        MIDINoteMessage noteMessage;
        noteMessage.channel = 0;
        noteMessage.note = 72 + i;
        noteMessage.velocity = 127;
        noteMessage.releaseVelocity = 0;
        noteMessage.duration = 2.0;
        MusicTimeStamp timestamp = i * 4 + 1;
        MusicTrackNewMIDINoteEvent(musicTrack2, timestamp, &noteMessage);
    }
    
    for(int i = 0; i < 4; i++) {
        MIDINoteMessage noteMessage;
        noteMessage.channel = 0;
        noteMessage.note = 62 + i;
        noteMessage.velocity = 127;
        noteMessage.releaseVelocity = 0;
        noteMessage.duration = 3.0;
        MusicTimeStamp timestamp = i * 4 + 1;
        MusicTrackNewMIDINoteEvent(musicTrack3, timestamp, &noteMessage);
    }
    
    for(int i = 0; i < 4; i++) {
        MIDINoteMessage noteMessage;
        noteMessage.channel = 0;
        noteMessage.note = 42 + i;
        noteMessage.velocity = 127;
        noteMessage.releaseVelocity = 0;
        noteMessage.duration = 2.0;
        MusicTimeStamp timestamp = i * 4 + 3;
        MusicTrackNewMIDINoteEvent(musicTrack4, timestamp, &noteMessage);
    }
    
    // Launch any iOS Synth App in audio background mode and add the code back in.
    // MIDIEndpointRef endpoint = MIDIGetDestination(1);
    // MusicSequenceSetMIDIEndpoint(musicSequence, endpoint);
    
    MusicPlayerPreroll(musicPlayer);
    MusicPlayerStart(musicPlayer);