forcing audio format from framegrabber?

I'm using xine-lib-1.1.16.3 in a small program that decodes audio
files for spectral analysis.  I'd like to resample the audio output to
a specific format (32-bit 48000kHz mono, to be precise), but I haven't
been able to find anything built into the engine that will let me do
this.  Is there a way to do this using code that's already in Xine, or
will I have to write the conversion code myself?

Thanks.

-- 
Soren Harward

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