Question / Help Crackling audio on OBS but not capturing from ffmpeg or QuickTime

S

sixmoney

New Member
I have a MacBook Pro (13-inch, 2017) running Mojave 10.14.6 and use OBS version 24.0.6

When I capture audio from an USB mic from obs there is a periodic crackling sound. While if using the same Mic I capture from ffmpeg or from Quicktime there is no issue at all. The mic is a cheap Gyvazla reported by OBS as "AK5371"

Also if I record from the internal mic of the macbook there is no crackling (using quicktime or using OBS)

Here are the two recordings (captured roughly simultaneously), I extracted the audio from the obs recording (blank video...)
obs: https://drive.google.com/file/d/19FiE_PBQWRLmZYmz1ibPUnLGBfn5kc9e/view?usp=sharing
ffmpeg: https://drive.google.com/file/d/1wP3V0UBmnPhBF4YmfdFMTjaxWGz165CO/view?usp=sharing

ffmpeg capture:
ffmpeg -f avfoundation -i ":0" -acodec aac -b 96k outmic.mp4
I tried using 44k and 48k in capture but apparently this is not helping.
Thank you for your help
 
Does it also happen if you record in simple output mode to a video format with a blank screen, and play it back in VLC?
 
Thanks for replying, as I said the linked audio was obtained capturing the mic only creating a black video. I extracted the audio for convenience. The captured video is a black screen (no video sources) and the sound I have linked. This video played either on quicktime or on VLC has those crackling artifacts. The weird thing is that if I capture the mic with quicktime or with ffmpeg I hear it perfectly fine (quality is also much better than the internal mic obviously).
 
Then I would check that OBS and your audio devices are set to the same sample rate (all 44.1 or all 48.0).
 
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