Comment # 18 on bug 1191247 from Andrea P

Hi! Something happened, however I can't tell exactly if before or after I've
created 60-usb-audio.conf.

The audio now works fine, however the volume of the right channel is slightly
below the left channel. This is now happening all the time: before the sleep,
after the sleep, after a fresh restart, after unplug and plug back the audio
device. Every Single Time.

Tried your kernel as well and it doesn't seems to change much. The right
channel is always lower then the left channel.

Tried to delete 60-usb-audio.conf, it doesn't change anything.

To avoid any doubt, I restarted on macOS (which is in dual boot on the same
machine), the audio is exactly the same for left and right channel. No
differences.