anchor.diff:  
         // Prepare sound, then play it
         _prepare(playingSound).then((_) {
  -        playingSound._player.ptr.seekTo((startTime * 1000.0).toInt());
  +        playingSound._player.ptr.seekTo(0);
           playingSound._player.ptr.start();
         });
   
  
positive.code:       sound,
        tag,
        loop,
        startTime,
        volume,
        pitch,
        pan,
  
negative.code:       double volume = 1.0,
        double pitch = 1.0,
        double pan = 0.0,
        SoundCompleteCallback callback = null]) {
  
      // Create new PlayingSound object
  