On Wed, 20 Jan 2021 22:17:35 +0100, Mike Oliphant wrote: > > I spent a fair bit of time debugging the code setting/getting mixer control > values, and I can't see anything that seems to be operating incorrectly. So, even if you unmute and raise both mixers, it didn't help, right? I took a look at the lsusb output, but I couldn't find anything else suspicious. > Unless you have any other suggestions, I'm going to admit defeat and return > the audio interface. > > It is probably worth committing the clock selector patch - it at least made > capture work, and it may help with other audio interfaces. OK, I'll submit two fix patches. thanks, Takashi