last time I
checked, Audacity didn't support real-time effects - only effects
printed to the track.
That was true until now, although I believe the latest PortAudio
supports JACK and a version of Audacity incorporating this is well
under way.
Personally, I like to be able to undo effects because I frequently get
them wrong! There is a LADPSA effects preview in version 1.20-pre1,
which helps. But for real-time effects work, would an in-memory
rather than disk-based application be better?
Cheers
Daniel