Thanks for all your replies. I was on digest (I have now turned this off), so I didn't get most of the replies until this afternoon. I'm encouraged, because it seems that much of what I have been doing was correct - and discouraged, because I still haven't got any sound! Ralf's suggested running 'aplay -l'. On my desktop computer I get this output: > **** List of PLAYBACK Hardware Devices **** > card 0: Intel [HDA Intel], device 0: VT1708S Analog [VT1708S Analog] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > card 0: Intel [HDA Intel], device 1: VT1708S Digital [VT1708S Digital] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > card 0: Intel [HDA Intel], device 2: VT1708S HP [VT1708S HP] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > card 1: Speaker [USB Speaker], device 0: USB Audio [USB Audio] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > card 2: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > card 2: NVidia [HDA NVidia], device 7: HDMI 0 [HDMI 0] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > card 2: NVidia [HDA NVidia], device 8: HDMI 0 [HDMI 0] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > card 2: NVidia [HDA NVidia], device 9: HDMI 0 [HDMI 0] > Subdevices: 1/1 > Subdevice #0: subdevice #0 I have 2 USB speakers connected to this computer. When I run 'card=0; killall -9 jackd; jackd -dalsa -dhw:$card -r48000 -p1024 -n2' for each of cards 0, 1 and 2, then open QjackCtl, Qsynth and Qtractor I typically get: > jackd: no process found > jackdmp 1.9.8 > Copyright 2001-2005 Paul Davis and others. > Copyright 2004-2011 Grame. > jackdmp comes with ABSOLUTELY NO WARRANTY > This is free software, and you are welcome to redistribute it > under certain conditions; see the file COPYING for details > JACK server starting in realtime mode with priority 10 > audio_reservation_init > Acquire audio card Audio0 > creating alsa driver ... hw:|hw:|1024|2|48000|0|0|nomon|swmeter|-|32bit > configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods > ALSA: final selected sample format for capture: 32bit integer little-endian > ALSA: use 2 periods for capture > ALSA: final selected sample format for playback: 32bit integer little-endian > ALSA: use 2 periods for playback > JackEngine::XRun: client = Qtractor was not run: state = 1 > JackAudioDriver::ProcessGraphAsyncMaster: Process error > JackEngine::XRun: client = Qtractor was not run: state = 1 > JackAudioDriver::ProcessGraphAsyncMaster: Process error > JackAudioDriver::ProcessGraphAsyncMaster: Process error > JackEngine::XRun: client = Qtractor was not run: state = 1 > JackAudioDriver::ProcessGraphAsyncMaster: Process error > JackEngine::XRun: client = Qtractor was not run: state = 1 > JackAudioDriver::ProcessGraphAsyncMaster: Process error > JackAudioDriver::ProcessGraphAsyncMaster: Process error > JackEngine::XRun: client = Qtractor was not run: state = 1 Sometimes I get references to Qsynth rather than Qtractor, but never both. It doesn't seem to depend on which card I am using. Incidentally, the output always refers to audio card Audio0, even when $card is set to 1 or 2. rncbc's suggestions were helpful. I have FluidR3_GM.sf2 loaded in Qsynth, and I checked that the mid input driver and audio output driver were as suggested. The rest of the instructions confirmed that I was importing the midi file correctly and making appropriate connections in Qtractor. Thanks also to Bob, Will and Jeremy for suggestions. I haven't actually got the piano here, so I can't try connecting it at the moment, but in any case I want to make sure I can get sound from Qtractor or something similar first. David _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
