Date: Wed, 20 Apr 2011 21:47:43 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-usb@freebsd.org Cc: Richard Kolkovich <richard@sigil.org> Subject: Re: Logitech QuickCam Pro 9000 Audio Message-ID: <201104202147.43914.hselasky@c2i.net> In-Reply-To: <20110420191257.GA7095@magus.portal.sigil.org> References: <20110217185328.GB3583@magus.portal.sigil.org> <20110420191257.GA7095@magus.portal.sigil.org>
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On Wednesday 20 April 2011 21:12:57 Richard Kolkovich wrote: > On Thu, Feb 17, 2011 at 12:53:28PM -0600, Richard Kolkovich wrote: > > I have a Logitech QuickCam Pro 9000 which is detected by snd_uaudio just > > fine (and webcamd, too!). The issue, though, is that I cannot manage the > > recording volume. I really only care about > > > muting/unmuting, but mixer doesn't think there are any recording devices on this device: > Looking into this again, it appears that the mixer *does* control the > volume as expected - but 0 is not muted. If I set the mic volume to levels > > 0, it is noticably louder. I cannot, of course, set it to a negative > number. :) > > Has anyone seen this sort of behavior on other audio devices (USB or > not...)? Any ideas how to resolve it? > > Cheers, Hi, Have a look at /sys/dev/sound/usb/uaudio.c . USB Mixer control's range are part of the audio descriptors in the configuration descriptor. If 0 does not mean off, then maybe some bias value is computed wrong. Compile kernel with options USB_DEBUG and enable hw.usb.uaudio.debug=15 Then look in dmesg for minimum and maximum mixer ctl. values. --HPS
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