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Audio is delayed in OBS
Might be caused by a Browser-source related bug in OBS.
Fully restart OBS and see if that clears the issue.
VDO.Ninja uses 48000khz sample rate for audio; using this sample rate whenever possible can help keep things in sync.
Try to avoid overloading your CPU or using too many browser source elements in OBS; OBS Browser Source can get overwhelmed.
VMix could be an alternative to OBS if problems persist; Vmix supports VDO.Ninja also.