--- Clemens Ladisch <[EMAIL PROTECTED]> wrote: > Dan Garton wrote: > > --- Clemens Ladisch <[EMAIL PROTECTED]> wrote: > > > Dan Garton wrote: > > > > # modprobe snd-usb-audio > > > > ALSA ../alsa-kernel/usb/usbaudio.c:1980: > 2:2:0 : > > > > AS_GENERAL descriptor not found > > > > > > It seems your device isn't 100% compatible with > the > > > USB audio > > > specification. Please post the output of "lsusb > -v". > > > > Thanks for the response. I had thought that the > device > > was fully recognised, from the contents of the > files > > generated in > > /proc/asound/card1/. > > > > Anyway here is the (complete) verbose lsusb > output: > > ... > > Well, your device actually is compatible. The > warning message above is > caused by a bug in the driver, but shouldn't affect > recording. > > > When I try to record from the device, I get an > empty > > file: > > > > # arecord -D plughw -t wav -d 5 test.wav > > > > test.wav then contains no data. > > "plughw" defaults to the first sound card. Please > try: > > arecord -D plughw:1 -r 44100 -c 1 -f S16_LE -v > -t wav -d 5 test.wav
Yes, this works. I have the mic recording now with arecord. yukka root # arecord -D plughw:1 -r 44100 -c 1 -f S16_LE -v -t wav -d 30 test.wav Recording WAVE 'test3.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono Plug PCM: Hardware PCM card 1 'Camera' device 0 subdevice 0 Its setup is: stream : CAPTURE access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 1 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 22050 period_size : 5513 period_time : 125011 tick_time : 2000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 5513 xfer_align : 5513 start_threshold : 1 stop_threshold : 22050 silence_threshold: 0 silence_size : 0 boundary : 1445068800 I found that there were many pops and clicks in the sound when I recorded with the capture level at 100% (if I tried to play such a file, raising the playback PCM level to over 81% cut out the sound entirely). Lowering the mixer capture level to around 77% improved this a lot, producing far less pops and crackles. yukka root # amixer -c 1 Simple mixer control 'Mic',0 Capabilities: cvolume cswitch cswitch-joined Capture channels: Mono Limits: Capture 0 - 55 Mono: Capture 40 [73%] [on] Simple mixer control 'Auto Gain Control',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on] At the moment Gnomemeeting is still refusing to be able to open /dev/sound/dsp1 to use it as a capture source - God knows why. One question: why do I have to modprobe snd-usb-audio manually for the webcam, when my PCI FM801-based card is recognised and has modules loaded on boot-up? My ALSA modules conf file is in one of my earlier posts. __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com ------------------------------------------------------- This SF.Net email is sponsored by: INetU Attention Web Developers & Consultants: Become An INetU Hosting Partner. Refer Dedicated Servers. We Manage Them. You Get 10% Monthly Commission! INetU Dedicated Managed Hosting http://www.inetu.net/partner/index.php _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
