FM Synthesis with Arbitrary Audio Sources

[libcrypt]

Does anyone know of a software FM synthesizer that allows you to use any arbitrary audio file (within reason) as both carrier and modulator sources? AU format is preferred, or standalone Mac (x86 or PPC).

[DavyAch]

Check out Rhino - it does whatI think you are asking.

[Echoes in the Attic]

Linplug Octopus I believe is another.

[libcrypt]

Thanks much. I have verified that Rhino does indeed work as advertised. It's a little clunky to add user audio, but nothing too horrid. Now to evaluate Octopus and compare.