It is very handy, but it's not working 100% on my system. For example,
I needed to capture the output of a soft synth (not Csound) to disk, and
while VAC
*does* work, it frequently locks up. Fortunately I only needed to
capture a short duration, and I was able to keep trying until
I captured a long enough segment.

I suspect that it could be something to do with DirectSound. (the
soft synth in question normally outputs to a DirectSound device, and the VAC
is probably not a DirectSound compliant device)

For "normal" WAV i/o, yes, it's very handy.

Greg.