jaap wrote: > cat /proc/asound/card0/stream0: > > YAMAHA Corporation YAMAHA RP-U200 USB Audio at usb-00:04.2-1.4 : USB Audio > > Playback: > Status: Stop > Interface 1 > Altset 1 > Format: S16_LE > Channels: 4 > Endpoint: 1 OUT (ADAPTIVE) > Rates: 44100, 48000 Four channels output, and no input. > cat /proc/asound/card0/stream1: > > YAMAHA Corporation YAMAHA RP-U200 USB Audio at usb-00:04.2-1.4 : USB Audio #1 > > Playback: > Status: Stop > Interface 1 > Altset 2 > Format: U8 > Channels: 1 > Endpoint: 1 OUT (ADAPTIVE) > Rates: 48000 mono 8-bit data? I guess this one isn't PCM format, otherwise ALSA wouldn't have put it into a separate PCM device. > Capture: > Status: Stop > Interface 2 > Altset 1 > Format: S16_LE > Channels: 2 > Endpoint: 1 IN (ASYNC) > Rates: 44100, 48000 > Interface 2 > Altset 2 > Format: S24_3LE > Channels: 2 > Endpoint: 1 IN (ASYNC) > Rates: 44100, 48000 16-bit or 24-bit stereo. > jackstart -Rv -d alsa -d hw:0,0 : #for hw:0,0 > ... > creating alsa driver ... hw:0,0|hw:0,0|1024|2|48000|0|0|nomon|swmeter|rt|32bit > ALSA lib pcm_hw.c:1078:(snd_pcm_hw_open) open /dev/snd/pcmC0D0c failed: No such file or directory hw:0,0 doesn't have capture, and playback has 4 channels. > jackstart -Rv -d alsa -d hw:0,1 : #for hw:0,1 > ... > creating alsa driver ... hw:0,1|hw:0,1|1024|2|48000|0|0|nomon|swmeter|rt|32bit > Couldn't open hw:0,1 for 32bit samples trying 24bit instead > Couldn't open hw:0,1 for 32bit samples trying 24bit instead > Couldn't open hw:0,1 for 24bit samples trying 16bit instead > Sorry. The audio interface "hw:0,1" doesn't support any of the > hardware sample formats that JACK's alsa-driver can use. 8 bit samples aren't supported by jack. You have to use hw:0,0 for playback and hw:0,1 for capture. HTH Clemens
