Haha, it never bothered me while playing the mission but now that you've mentioned it I can understand why some might find it jarring on a replay. Personally I like it because it reminds me of the Disco Elysium OST 'Instrument of Surrender' by Sea Power. But if it's an issue for you then you can just delete clarinet[1-6].ogg from the mission's snd\ambient directory or replace the tracks with something else ^^