External USB audio HyperX - microphone recording issue

quakerdoomer

quakerdoomer

This is regarding an external USB audio card.
Since none of the attempts to use the internal microphone worked, I tried an external one. I am using a HyperX USB sound card and it records and plays fine on Windows. It plays the audio well on FreeBSD 13, but when I record something, the output is garbled and incomprehensible. Is there a way to fine tune this to make the microphone usable or is it unsupported?

The USB audio card shows as uaudio0: <Kingston HyperX Virtual Surround Sound>

pcm3: <USB audio> on uaudio0


cat /dev/sndstat
Installed devices:
pcm0: <Realtek ALC257 (Analog)> (play/rec) default
pcm1: <Realtek ALC257 (Right Analog Headphones)> (play)
pcm2: <Intel Kaby Lake (HDMI/DP 8ch)> (play)
pcm3: <USB audio> (play/rec)


I also set
sysctl hw.snd.default_unit=3

Do I need to set some hints to make the mic usable? Kindly advise if possible.
 
Try with an increased hw.snd.latency (maximum is 10).
Make sure hw.snd.latency_profile=1 (it is by default).
Also check hw.usb.uaudio.buffer_ms.

Also try with dev.pcm.3.bitperfect=1 and dev.pcm.3.rec.vchans=0.

Run # service mixer restart and restart your recording program after setting sysctls so that changes are applied before testing.
 
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