[xxxdarrenxxx]

Neither, there has been research done of people programming, and they measured the most activity to be in areas related to short term (working) memory.

Also as a 10+ year musician, I prefer programming (or any task that needs focus) without any sound. Listening to music, makes me noticeably more relaxed in a "bad way", and I definitely can't get into the nitty gritty of an actual problem, with anywhere close of a hyperfocus "shit is real" kind of attitude.

Music can get me in the mood, but when I get there and the music is off, it's 5 hours later and I wrote a figurative 1000 lines of working code.