Can I ask what you changed about usb audio performance? And will these changes also come to the headphone (a)?
right now I’m investigating why the headphones don’t seem to work with switch 2 over usb-c, when I have other usb-c headphones that do work with the console.
At the moment the issue appears to be that the headphone (a) don’t support or default to any 16-bit formats, which causes the switch to ignore them once connected.