I typically go for punk on Spotify when brewing in the garage. (Old) Misfits, Dead Kennedys, Social Distortion, NOFX, Lars Frederiksen, The Accidents, Kings of Nuthin, etc.
If I'm brewing in the backyard I'll crank up the stereo in the house with some black metal (Watain, Dissection, Gorgoroth), death metal (Amon Amarth, Morbid Angel, Kataklysm), or industrial (KMFDM, Combichrist, Suicide Commando).
I'm pretty sure my HOA has a no Slayer clause somewhere in the 100-page book of covenants so I have to crank them up on occasion too.