Opus should improve the quality/bitrate of mp3, vorbis and speex codecs. It could be used to reduce the size of music and speech dialogs in mobiles games.
Information about opus:
You need HAXE and OPENFL. http://www.openfl.org/
haxelib install openfl-opus
The Opus API is pretty simple. It uses ByteArray and Sound objects for decoding.
opus.Opus.getVersion():String;
opus.Opus.decode(bytes:Bytes):Sound;trace('Opus version: ' + Opus.getVersion());
var opusBytes:ByteArray = Assets.getBytes("assets/sample.opus");
var sound:Sound = Opus.decode(opusBytes);
sound.play();