I have a strange problem: When I play any sound on Nanopi Neo (I am currently using Nanopi Neo Core), the left and right audio channels are phase shifted. So the left channel is exactly reversed to the right channel. The problem is that when I feed them together into a mono signal they will offset each other so that (almost) no audio comes out in the end.
So this is what it looks like when I play back some sinus tone:
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phase.JPG
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Does anyone have an idea what could cause this? :roll: Thank you!!!

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