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When playing through Foobar2000 or Winamp, which chip will be used by default? pv16?
I'd assume selecting 24 bit fixed-point output format in foobar would result in bypassing the EMU DSP altogether (via the 24 bit path).
Winamp is 16 bit only, though the third-party MAD decoder does allow you to select 24 bit output, IIRC.
By default both of them will almost certainly go through the EMU10k and get resampled, but this isn't shouldnt be a problem with the Audigy or Audigy2 or most other AC97 compliant cards outside of the Live!.