On 4/7/07, Simon Lewis simon.lewis@mnet-online.de wrote:
Dear Alsa developers
Audacity seems to work perfectly with AOSS and Jack but not directly with ALSA on some linux PCs. Trying to use ALSA directly leads to severe distortion due to lack of sync with Alsa. (I hope that is the correct terminology.)
I received this reply from the Audacity developers, what tools are available from ALSA to investigate this problem? How can I determine what the real "Alsa configuration" is that portaudio has used setting up communication with Alsa.
Please try to narrow it down some. What hardware/kernel/distro versions work OK and which don't? Especially important is the motherboard chipset, ALSA version and exact make/model of soundcard.
My guess is that different soundcards default to different period/buffer config values, and that Audacity wrongly assumes the buffer/period size it gets from ALSA by default is sane on all hardware.
Lee