Instrumental heavy metal.
When I was in the office, always metal. At home I’m more likely to listen to classical, but still metal if I need to be totally focused.
Selected Ambient Works
90s electronic, Autechre
I love 90s electronic for concentration. But I’ve gotten into Tycho recently.
Incunabula, their debut album as Autechre, is also fantastic:
“Elevated Jam Tracks” on youtube (mostly chords and no distracting words/vocals).
Anything without vocals so that it doesn’t force me to actually think about it, just vibe.
Lately Chikoi The Maid (maidcore rock) or Gnome (the Father Of Time album, just-riffs-rock?) to some dnb/techno stuff, depends on the mood and how hard I need to focus - faster is better then.