You would have to hack it into sound.datatype. But then, almost nothing is really using datatypes for direct audio playback. Even just loading audio files via datatypes is extremely rare.
The biggest problem with datatypes for this is the fact that they don't really support progressive decoding of stream data. Not sure how the animation.datatype does it, but the rest all seem to rely on decoding the entire stream into whatever format the superclass expects. This simply isn't practical on classic systems when a 5 minute mp3 file would decode into tens of megabytes of audio data.
+1 to the reggae framework.
