help using audiosource's GetSpectrumData and GetOutputData

Hi, I've been playing around with audiosource's and am trying to access the data in an assigned audio clip.

Does anyone have any info on how to use GetSpectrumData or GetOutputData as there doesn't seem to be much in the way of documentation on these methods?

Or do they actually work at all?

Any examples would be brill as well:)

BTW I'm using Unity v3.0.0b4

Thanks All