There a few places in com.sun.media.sound where a new array is created and then immediately filled with default values.
1. com.sun.media.sound.ModelInstrument#getChannels

            boolean[] ch = new boolean[16];
            for (int i = 0; i < ch.length; i++)
                ch[i] = false;

2. com.sun.media.sound.SoftChannel#dontResetControls

    private static final boolean[] dontResetControls = new boolean[128];
    static {
        for (int i = 0; i < dontResetControls.length; i++)
            dontResetControls[i] = false;

3. com.sun.media.sound.SoftChannel#controlChangePerNote

            keybasedcontroller_active[noteNumber] = new boolean[128];
            Arrays.fill(keybasedcontroller_active[noteNumber], false);
            keybasedcontroller_value[noteNumber] = new double[128];
            Arrays.fill(keybasedcontroller_value[noteNumber], 0);

4. com.sun.media.sound.SoftPerformer#SoftPerformer

        midi_ctrl_connections = new int[128][];
        for (int i = 0; i < midi_ctrl_connections.length; i++) {
            midi_ctrl_connections[i] = null;
        }
        midi_connections = new int[5][];
        for (int i = 0; i < midi_connections.length; i++) {
            midi_connections[i] = null;
        }

It's redundant. Java guarantees that all elements of array have default values after array creation.