On Wed, 24 Jul 2013 04:54:00 +0200 Smilen Dimitrov sd@imi.aau.dk wrote:
I ran this on Ubuntu 11.04 Natty, Linux 2.6.38 and corresponding ALSA 1.0.24.2, audacity-1.3.13, PortAudio V19 - more about my machine and environment setup is in the Readme:
http://sdaaubckp.sourceforge.net/post/alsa-patest-duplex/Readme
Please don't use such an old version of Audacity - we have updated our Portaudio snapshot significantly since then. Bugs in obsolete code really aren't interesting.
In Audacity, as far as I could see, there is only one PortAudio callback defined (audacity-1.3.13/src/AudioIO.cpp has audacityAudioCallback;), so Audacity basically has a single "wire" callback for full-duplex.
Correct.
I can't help with anything else, sorry, except to agree with Alan that you need to take as much as possible out of the equation to start with - and that certainly means Audacity. If at all possible, use current versions of software, and a set-up that others can replicate as much as possible.
Richard