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It's interleaved as usual for stereo data, but the metadata says 96kHz. I think the reason they did that is the USB spec says you can't cut packets halfway through samples (between L and R), but it's buggy and they do. So they pretend it's mono and it mostly sounds fine.
The patch adds a quirk to deal with this bug (which exists in other chinese chips, so it was already implemented...), and another quirk to override the metadata to 48kHz 2ch. The remaining issue with the channels being backwards is for userspace to deal with.
