В Ср, 10/06/2020 в 08:44 +0100, Laurence Tratt пишет: > On Mon, Jun 08, 2020 at 05:43:05PM +0300, Alexander Tsoy wrote: > > Hello Alexander, > > > > The frame size calculation in USB-audio driver wasn't accurate > > > enough > > > because of the computation in Q16.16 format. It works OK for > > > async mode, > > > but for others, it can accumulate rounding errors. The recent > > > change > > > corrected it for a more precise way. > > I believe that SSL and Audient devices operates in async mode. > > Would be > > nice to see "lsusb -v" output for them. > > Please find attached the "lsusb -v" output. Thanks! So SSL 2+ is indeed currently needs implicit feedback quirk. The question is why it didn't help in your case.