Re: "ticking" noise when recording audio

- If you change the sndiod(8) rate (-r option), or buffer size (-b
option) does the ticking change?

- could you send me a short .wav file with the ticking sound?

On Wed, May 31, 2023 at 11:59:20PM -0700, Courtney Hicks wrote:
> Hello all,
>
> I am trying to record audio from a USB device. I successfully
> get audio from it, however, there is a constant "ticking" sound
> that happens whether or not audio is actually playing through
> the device. Here's the device from the dmesg:
>
> uvideo0 at uhub0 port 7 configuration 1 interface 0 "MACROSIL AV TO USB2.0"
> rev 2.00/1.21 addr 2
> video0 at uvideo0
> uaudio0 at uhub0 port 7 configuration 1 interface 3 "MACROSIL AV TO USB2.0"
> rev 2.00/1.21 addr 2
> uaudio0: class v1, high-speed, sync, channels: 0 play, 1 rec, 2 ctls
> audio1 at uaudio0
>
> I enabled kern.audio.record, have tried aucat and ffmpeg to record
> the audio to file, but they both suffer the same issue. Tried monitoring
> with this command:
>
> $aucat -f snd/1 -d -r 96000 -o - | aucat -i -
> stdout: rec, chan 0:1, 48000Hz, s24le4msb
> snd/1: 48000Hz, rec 0:1, 18 blocks of 480 frames
> stdout: started
> started
> stdout: stopped
>
> I can hear the audio I expect but behind the "ticking" noise.
> I'm using this device to get audio/video from a VCR, I can confirm
> it is not the VCR or this device since they both work fine with OBS
> studio on Linux. Any help is much appreciated.
>
> Courtney
>
>