This is a note to let you know that I've just added the patch titled ALSA: usb-audio: Correct surround channels in UAC1 channel map to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: alsa-usb-audio-correct-surround-channels-in-uac1-channel-map.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it.