Adafruit VS1053 Codec + MicroSD Breakout - MP3/WAV/MIDI/OGG Play + Record - v4

I've spent hours so far helping you get your code working. I've posted code above (at the end of last post) that I just tested, and that is working perfectly, without any loss of memory. In fact you could use the code below, which allows you to just call _playSoundFile without worrying about calling _stopSoundFile first:

var AUDIOUT = A0;
var w = new Waveform(2048, {doubleBuffer:true});
var fileBuf, f;
w.buffers = [ w.buffer, w.buffer2 ];
w.on("buffer", function(buf) {
  buf.set(fileBuf);
  fileBuf = f.read(buf.length);
  if (fileBuf===undefined)
    _stopSoundFile();
});
function _playSoundFile(file) {
  _stopSoundFile();
  LED3.write(1);
  var filename = file;
  f = E.openFile(filename,"r");  
  w.buffer.set(f.read(w.buffer.length));
  w.buffer2.set(f.read(w.buffer.length));
  fileBuf = f.read(w.buffer.length); 
  analogWrite(AUDIOUT, 0.5, {freq:20000});
  w.startOutput(AUDIOUT,8000,{repeat:true});
}
function _stopSoundFile() {
  LED3.write(0);
  if (w.running) w.stop();
  AUDIOUT.write(0);
  if (f) f.close();
  f = undefined;
  fileBuf = undefined;
}

I'm afraid I just don't have time to help you throw everything away and start again from scratch, especially when I offered to fix your code and you can't be bothered to strip it down enough that you can post it up for me.