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

PROGRESS!! It's working, whoop! ... Still a few glitches to iron out but the way it sounds actually works better for my project (will share when done).

Main issue, a large raw file (+9mb) plays ok, but when I stop and restart it I get out of memory error. Can I free the memory taken by the file?

Example block:

var AUDIOUT = A1;

function TRamp_playSoundFile(file)
{
  var f = E.openFile("/audio/" + file,"r");
  w = undefined;
  w = new Waveform(2048, {doubleBuffer:true});
  // load first bits of sound file
  w.buffer.set(f.read(w.buffer.length));
  w.buffer2.set(f.read(w.buffer.length));
  var fileBuf = f.read(w.buffer.length);
  // when one buffer finishes playing, load the next one
  w.on("buffer", function(buf) {
    buf.set(fileBuf);
    fileBuf = f.read(buf.length);
    if (fileBuf===undefined)
    {
      w.stop(); // end of file
      f.close();
      TRamp_stopSoundFile();
    }
  });
  // start output
  analogWrite(AUDIOUT, 0.5, {freq:20000});
  w.startOutput(AUDIOUT,4000,{repeat:true});
}

function TRamp_stopSoundFile()
{
  AUDIOUT.write(0);
  w = undefined;
}