Hello all, I've been trying out the newly improved JACK support in Audacity and can confirm that it does work. If other people could give this some testing I'm sure it would help solidify the feature. Please consider joining the audacity-devel list and sending feedback. To build Audacity with JACK support you need to do this: cvs -d:pserver:anonymous@xxxxxxxxxxxxxxxxxxx:/cvsroot/audacity login (hit the enter key when it asks for a password) cvs -z3 -d:pserver:anonymous@xxxxxxxxxxxxxxxxxxx:/cvsroot/audacity co audacity (the above is all one line) cd audacity ./configure --with-portaudio=v19 --without-portmixer (edit src/Makefile and add this to the end of the LIBS line if it's not there): -lasound -ljack Then make and make install as usual. Start JACK, start Audacity and you should have a JACK option in Preferences under Audio I/O. You may need to disable the VU meters to get reliable playback on a slow machine - that option is on each meter's drop-down menu. Cheers Daniel