I believe that he is talking about the drum and bass music genre:

https://www.bing.com/search?q=drum+and+bass&pc=MOZI&form=MOZLBR


I'm no longer allowed to go caroling at the psych hospital.
I guess Do You Hear What I Hear was a bad song choice!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware