I download a test WAV file testing.wav. ALSA here seems to be working nicely, as I can hear the test sound using aplay. I try to do the same using jackd. I start it as: $ jackstart -d alsa And from another shell I do and get: $ jack.play testing.wav jack.play: sample rate of file not that of server Let's assume this is correct. So I stop jackstart and run it again like this: $ jackstart -v -d alsa -r 11025 -S Then jack.play doesn't give any error but I can hear no sound. Find attached jackstart's stderr output. This computer is a Dell Latitude D610 laptop with an Intel ICH6 AC'97 audio controller running Debian sid and a 2.6.15.2 kernel with preemption enabled and the realtime module loaded. Summarizing, ALSA outputs sound, but jackd through ALSA doesn't. I got here since I noticed that fluidsynth played MIDI files using ALSA but not using jackd. Then I discarded a fluidsynth issue. Any ideas? Cordially, Ismael -- Dropping science like when Galileo dropped his orange http://lamediahostia.blogspot.com/ http://www.flickr.com/photos/ivalladt/