For me, it's the Alban Berg Quartet (ABQ [Aye-Bee-Cue])
https://www.youtube.com/watch?v=ihvr6zSL1XE&list=OLAK5uy_k97p7mWR10dlF4SNSbqzftbb7s-x1XbSg&index=17

>>126900778
More jovial music.