[Bug 272718] Blue Yeti microphone does not work

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272718

--- Comment #6 from Florian Walpen <dev@submerge.ch> ---
These error messages hint at the vchan conversion (man sound), not USB:

kernel: feeder_init(0xfffff80003281480) on feeder_matrix returned 22
kernel: pcm1: feeder_build_matrix(): can't add feeder_matrix

But one question first: Your microphone reports as 2-channel recording device.
Is this correct?

Now from the second "cat /dev/sndstat":

{userland} -> feeder_root(0x08800010) -> feeder_matrix(7.1 -> 2.0) ->
feeder_volume(0x00200010) -> {hardware}
...
{hardware} -> feeder_root(0x00200010) -> feeder_matrix(2.0 -> 7.1) ->
feeder_volume(0x08800010) -> {userland}

This looks like you tried to playback 8-channel audio instead of 2-channel, and
the same for recording. Which doesn't make sense. Maybe a virtual_oss
misconfiguration?
Can you try to disable virtual_oss (and any other sound server) completely and
use an application that lets you choose the OSS dsp device directly? Audacity
for example. And 2 channels for both playback and recording.

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