Hector Martin

(Right click and open those images at original resolution to get the proper idea; Twitter always scales by default)

So I would call this a fairly capable 720p capture card overall, and only slightly lower performance at that resolution than devices that cost 10 times as much. At 1080p things are a bit messier, but it does work.

So it turns out they report audio at 1ch 96kHz, but it's actually 2ch 48kHz. Currently testing a quirk patch for Linux, assuming it works as intended expect it in a stable series near you once it percolates through the pipeline.

FWIW, interpreting 48k stereo as 96k mono (and downsampling to 48k, because you are, right?) is mathematically equivalent to a clean mono mixdown except one channel is delayed by 0.5 samples, which is negligible. So it's safe to use the card on Win/Mac and pretend it's mono.

Basically for mono (center panned) content you'll get a slight high frequency rolloff (4dB or so at Nyquist = 24kHz), and hard panned content will sound fine with no distortion.

I have a suspicion as to what causes this and Linux might already have a quirk to deal with it. I think this happens when the USB transfer size is not a multiple of the number of channels.