Date: Sun, 11 Sep 2011 21:51:42 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: "Mikhail T." <mi+thun@aldan.algebra.com> Cc: freebsd-multimedia@freebsd.org, freebsd-usb@freebsd.org Subject: Re: [uaudio] Sound-recording too fast Message-ID: <201109112151.42363.hselasky@c2i.net> In-Reply-To: <4E6CFEC4.5050100@aldan.algebra.com> References: <201109110308.p8B38btZ057145@narawntapu.narawntapu> <201109111008.12973.hselasky@c2i.net> <4E6CFEC4.5050100@aldan.algebra.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sunday 11 September 2011 20:32:36 Mikhail T. wrote: > 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 > > > > Or: > > > > 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 @@ > bit_resolution, > p_fmt->description); > > + if (ep_dir == UE_DIR_IN) > + chan->sample_rate = > rate/3; > + else > chan->sample_rate = rate; > chan->p_asid = asid; Hi, > > I wonder, if a quirk can be added for this device... That's not impossible, though I need some more background on your 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? There are some sysctls which makes this possible. Can you dump the configuration descriptor of your device using usbdump? > > > 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' > > 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 Is your device marked spd=HIGH ? --HPS
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201109112151.42363.hselasky>