On Tue, 13 Jun 2023 05:22:53 +0200, happy.debugging@xxxxxxxxx wrote: > > The Endpoint Product ID is a string field and supposed to be unique. It's copied from `iSerialNumber` of the device for USB MIDI. > MIDI.ORG published an updated UMP specification today, dated June 15, 2023. Section 7.1.5 Adds the concept of Product Instance ID. Instead of returning the VID/PID, could this ID be returnedserial instead in the port data if it is available from the device ? See the latest patch set for the new UMP 1.1 spec: https://lore.kernel.org/r/20230612081054.17200-1-tiwai@xxxxxxx It's been already merged to sound git tree. Takashi
