On Thu, 22 Apr 2021 21:20:19 +0200, Mike Oliphant wrote: > > I had wondered whether the hardcoded endpoints were necessary (or always > accurate). > > This method seems much cleaner, and I can report that it is working as > expected (playback-only, record-only, and full duplex) on the BOSS GT-1. Thanks for confirmation. FWIW, the patches are on my for-next branch, destined for 5.13 kernel. Takashi