Is it odd that I can instantly spot that horrible 1kHz buzz caused by cheap USB soundcards even in professional videos? USB sucks for audio.
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@doragasu I had a similar issue w/ an Acer, because it had 3-prong AC but 2-pin DC (- and earth are one pin). Horrible ground loop noise.
@doragasu Basically the rule to avoid this is to never send power over signal or earth reference, which is what USB breaks.
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@marcan42 Never send power over *ANALOG* signal or earth reference ;-) -
@doragasu Well, the problem is that the signal ground here _is_ earth reference :-) (and power noise isn't good for digital either!) - Show replies
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@marcan42 Also you can send power over analog signal ground if you make sure trace inductance is low enough (e.g. groun plane, ADC GND pin). -
@doragasu Yeah, but never over a cable. I reduced my Acer noise issue quite a bit by adding a big fat bypass from the chassis to mains earth
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