mState = State.STARTING;

thread = new Thread()
{
    public void run()
    {
        mPlayer.open();
        boolean started = false;

        mState = BeatMachine.State.STARTED;

        boolean wasNextBufferPlayed = true;
        int end = 0;

        while (mState == BeatMachine.State.STARTED && !areAllTracksComplete()) {

            if (wasNextBufferPlayed) {
                // calculate how much audio we can write and make sure it is an even frame (end % channels == 0)
                end = mPlayer.availableFrames() * mPlayer.getChannels();
                wasNextBufferPlayed = false;

                for (int i = 0; i < mTracks.size(); i++) {
                    // get the next buffer of audio from the current track
                    mTracks.get(i).nextBuffer(mMixerBuffer , end);

                    // if it is the first track, overwrite the buffer,
                    // otherwise mix the buffer
                    for (int j = 0; j < end; j++) {
                        if (i == 0) // maybe this if could be optimized out of this loop
                            mMasterBuffer[j] = mMixerBuffer[j];
                        else
                            mMasterBuffer[j] += mMixerBuffer[j];
                    }
                    wasNextBufferPlayed = false;
                }
            }

            wasNextBufferPlayed = mPlayer.play(mMasterBuffer , end);

            // the buffer is completely full (could FloatAudioPlayer potentially have autostart behavior)
            if (!started && mPlayer.availableFrames() == 0) {
                mPlayer.start();
                started = true;
            }
        }
        mPlayer.close();
        mState = BeatMachine.State.STOPPED;
        System.out.println("This line prints in all scenarios");
        }
    };

    thread.start();
}