[Bug 230434] USB sound card fails to record

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230434

--- Comment #24 from Hans Petter Selasky <hselasky at FreeBSD.org> ---
The RPI3 has some limitation on the ISOCHRONOUS schedule, so you might need to
set:

sysctl dev.pcm.0.rec.vchanrate=32000
sysctl dev.pcm.0.play.vchanrate=32000

In order to use duplex audio!

Or get a HIGH-speed USB audio device.

--HPS

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