On 11.09.2011 04:08, Hans Petter Selasky wrote:
Doesn't aiff files use a fixed sample rate? Try:

env AUDIODEV=/dev/dsp1 rec -r 16k /tmp/test.aiff


env AUDIODEV=/dev/dsp1 rec -r 8k /tmp/test.aiff
Well, I first noticed the problem using Skype, so I doubt, it is rec- or aiff-specific. For me the quick and dirty hack below saved the day -- the recording is nice and clear now and I have no other USB audio devices for this computer anyway:

   --- sys/dev/sound/usb/uaudio.c 2011-07-24 19:12:34.000000000 -0400
   +++ sys/dev/sound/usb/uaudio.c 2011-09-10 23:41:09.000000000 -0400
   @@ -1026,4 +1026,7 @@

   +                                       if (ep_dir == UE_DIR_IN)
   +                                               chan->sample_rate =
   +                                       else
                                            chan->sample_rate = rate;
                                            chan->p_asid = asid;

I wonder, if a quirk can be added for this device...

I'm really surprised if your Logitech announces that it supports 48K and simply 
outputs 16K. It would be
the latest great example of USB specification violation!

Maybe, the rate can altered on the fly by the driver, with 48K being the highest available, but 16K being the default?

A dump of the descriptors using usbconfig and "sysctl hw.usb.uaudio.debug=15"
would also be appreciated.

   % sysctl sysctl hw.usb.uaudio.debug
   sysctl: unknown oid 'hw.usb.uaudio.debug'

I guess, I need to have USB_DEBUG on...

   % usbconfig
   ugen0.1: <UHCI root HUB VIA> at usbus0, cfg=0 md=HOST spd=FULL
   (12Mbps) pwr=SAVE
   ugen1.1: <UHCI root HUB VIA> at usbus1, cfg=0 md=HOST spd=FULL
   (12Mbps) pwr=SAVE
   ugen2.1: <EHCI root HUB VIA> at usbus2, cfg=0 md=HOST spd=HIGH
   (480Mbps) pwr=SAVE
   ugen3.1: <UHCI root HUB VIA> at usbus3, cfg=0 md=HOST spd=FULL
   (12Mbps) pwr=SAVE
   ugen4.1: <UHCI root HUB VIA> at usbus4, cfg=0 md=HOST spd=FULL
   (12Mbps) pwr=SAVE
   ugen5.1: <EHCI root HUB VIA> at usbus5, cfg=0 md=HOST spd=HIGH
   (480Mbps) pwr=SAVE
   ugen2.2: <product 0x081b vendor 0x046d> at usbus2, cfg=0 md=HOST
   spd=HIGH (480Mbps) pwr=ON
   ugen0.2: <Microsoft Wireless Optical Mouse 1.00 Microsoft> at
   usbus0, cfg=0 md=HOST spd=LOW (1.5Mbps) pwr=ON



freebsd-usb@freebsd.org mailing list
To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"

Reply via email to