I was trying to do some basic mic recording last night, and I was having strange problems. My sound card is a turtle beach santa cruz using the snd-cs46xx module. Audacity had no trouble recording - sounded fine. Timemachine on the other hand experienced horrible hissing. I tried every conceivable mixer level/muting/gain combination I could think of and always got the awful hiss. Why might the same mixer settings work great in Audacity which uses OSS (via the emulation), and not in Jack? -- De gustibus non disputandum est.