buggy section

#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
    /* init sound */
    is_playing = rb->mp3_is_playing(); /* would we disturb playback? */
    if (!is_playing) /* no? then we can make sound */
    {   /* prepare */
        rb->mp3_play_data(beep, sizeof(beep), callback);
    }
#endif