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Date:      Thu, 24 Oct 2024 01:35:34 +0000
From:      bugzilla-noreply@freebsd.org
To:        usb@FreeBSD.org
Subject:   [Bug 174835] [uaudio] uaudio fails to create pcm/dsp device file
Message-ID:  <bug-174835-19105-dzAMBTs3YG@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-174835-19105@https.bugs.freebsd.org/bugzilla/>
References:  <bug-174835-19105@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D174835

Florian Walpen <dev@submerge.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dev@submerge.ch

--- Comment #7 from Florian Walpen <dev@submerge.ch> ---
> Device has 4 channels output, 2 channels input, but on mixer only 2 chann=
els as 1x=20
> stereo is recognized as pcm, vol.

Try to set

sysctl dev.pcm.5.play.vchanformat=3Ds24le:4.0
sysctl dev.pcm.5.rec.vchanformat=3Ds24le:2.0

to enable 24bit sound quality and 4 channel playback. Not many applications
support 4 channel playback though. You could use virtual_oss to split it in=
to
two stereo pcm devices, if that's what you want.

--=20
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