AAC-MP4 Audio: No Sound in Chrome & IE

[Björn Sandmann]

I have a AAC *. Sound File (encoded in Android -> http://developer.android.com/guide/appendix/media-formats.html) residing in a appengine blob

In GWT i'm using your simple sample to play the file:

SoundController soundController = new SoundController();
    Sound sound = soundController.createSound(Sound.MIME_TYPE_AUDIO_MPEG, "http://xxxx.appspot.com/download?blob-key=xxx");
    sound.play();

 Playing the sound works fine in Firefox 11.0, but i have no sound in Chrome 18.0 and IE8

Am i missing something in the code to get it working?

Any other ideas to get AAC-MP4 or maybe 3GP working in GWT without JSINI ?

Thanks