public void buildTrackAndStart() { int[] trackList = null; sequence.deleteTrack(track); track = sequence.createTrack(); for (int i = 0; i < 16; i++) { trackList = new int[16]; int key = instruments[i]; for (int j = 0; j < 16; j++) { JCheckBox jc = (JCheckBox) checkboxList.get(j + (16 * i)); if (jc.isSelected()) { trackList[j] = key; } else { trackList[j] = 0; } } // close inner loop makeTracks(trackList); track.add(makeEvent(176, 1, 127, 0, 16)); } // close outer track.add(makeEvent(192, 9, 1, 0, 15)); try { sequencer.setSequence(sequence); sequencer.setLoopCount(sequencer.LOOP_CONTINUOUSLY); sequencer.start(); sequencer.setTempoInBPM(120); } catch (Exception e) { e.printStackTrace(); } } // close buildTrackAndStart method