GetSpectrumData Obsolete?

I have been looking at doing some stuff with audio in some projects and I was looking up how to get the spectrum data from the audio source. The thing I noticed though is in the scripting documentation it says

Obsolete
“GetSpectrumData returning a float is deprecated, use GetSpectrumData passing a pre allocated array instead.”

Yet I am getting no luck finding a part of the documentation that deals with the system as it is. Does anyone have a link or any tips on how to use this in it’s current form?

Sorry, but we can’t really help you here. It’s a bug and they haven’t fixed it yet.

http://forum.unity3d.com/threads/getspectrumdata-documentation-accessible-by-search-but-not-by-browsing-doc.342854/