See this image: https://i.imgur.com/Mg20l5s.png https://i.imgur.com/Mg20l5s.png Captured with such a capture card. If you play this file you would only hear th

See this image: https://i.imgur.com/Mg20l5s.png https://i.imgur.com/Mg20l5s.png Captured with such a capture card. If you play this file you would only hear the first ~20kHz if you are lucky. The 2nd channel is on top. That's my guess, but happy to be corrected. It sounds fine though.