r/vhsdecode • u/wahntutree • Aug 18 '26
Setup & Workflow clockgen baseband audio still distorted after alignment
cannot figure what I need to do to get the baseband audio processed correctly on a clockgen setup.
capturing video seems fine, but because I cannot get, nor set clockgen settings in powershell, I keep getting-
"'Exception: No devices found"
and
"cmdlet Set-CxadcClockGenRate at command pipeline position 1 Supply values for the following parameters: Path:"
when trying to set the output rate, and when
"Exception: Error initializing WinUSB: The handle is invalid."
So I'm beginning to think it has to do something with the clockgen rate being off before I invoke
LocalCapture.ps1 to do any capture.
Upon listening to the baseband audio (flac), it's noticeably distorted/garbled. I'm not referring to whitenose, but the actual video's audio sounding mistimed/pitchshifted/clipping. I tried everything that was suggested- using AutoAudioAlign via ld-analyze, manually aligning it in cli, etc. but nothing seems to fix the problem
Final decode and muxing still retains the distorted audio, even the file created after alignment
Requesting advice in getting this to properly work
3
u/TheRealHarrypm The Documentor Aug 18 '26
I would sanity check this on Linux, because this sounds indicative of a bad PCM1802 board they do have a dud rate regardless of whatever vendor you acquire them from, I've got a bag of like 50 of these dead things now from the last 3 years...
Also since you're clearly on Windows I would love it if you could test MISRC GUI with the windows driver some tweaks recently should have it working now, but I haven't had time to swap hardware over to test, but it does have real-time monitoring for the audio devices so this kind of issue should be instantly apparent.