Along these lines, I thought I'd share a recent post to the XWAX developers list (its not chuck related, but maybe someone wants to take some inspiration, and pack the XWAX code into a chuck ugen):
>Hey!
>
>I just did a quick hack of wrapping the timcoder.c code into a flext
>external, so the timecoder can
>be used in pd or max/msp (dunno about v5) and be used for stuff like
>scratching videos and alike.
>This is a very small and easy hack but it works
>http://karhumusic.sesser.at/vinylcontrol.tar.gz
>Documentation is in the tarball as vinylcontrol.pd patch with some
>comments. I left the binaries
>in the tarball as some might have problems building the external (...
>next time I should not forget
>to delete the binaries with debug symbols, heh...).
>
>so long...
>Niklas