What music do you use for concentration?

Instrumental heavy metal.
- Post rock for me. It's a wide genre that is sometimes classical in nature to punk metal.

Techno, house, trance, or nintendo music.
- Second this, love the trance and Nintendo tunes! There’s some good lofi Nintendo mixes on YouTube that get me through work

Depends on the kind of concentration. If I'm programming or doing some kind of math, I want fury. I'm reaching for Slayer or Megadeth or the Doom sound track. Nothing like Angel of Death to plow through something.
If it's more contemplative, power ballads. Something I can sing without focusing on it. I Want to Know What Love Is. Keeps pace, but it's more emotional. Keeps me in that thoughtful place.
Cooking, woodworking, cleaning. Something active but not on the whole fast. Heavy metal, southern rock, or blues. Kiss, CCR, Lynyrd Skynyrd, BB King. Something even tempo that can pick up and come back down. Freebird followed by Fortunate Son is a good example.

Either ambient instrumental music (lots of Brian Eno) or any music that I know all the words to (so that my brain doesn't have to actively process the lyrics).

When I really need to concentrate I put on music in a foreign language. Mainly German because I've found a lot of German bands I like. Some of my favorites that sing mainly in German:
Wizo
Die Ärzte
Die Toten Hosen
We Butter Out Bread With Butter

I've been listening to breakcore lately. Gets me in the mood for serious work, it's like a microdose of adhd meds

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.

Honestly, I cant listen to anything while trying to concentrate. Music distracts me when I'm trying to focus on a mental task. Now if I'm doing physical labor or whatever, much easier. 80s music for sure. New Wave, synthpop. Good stuff.

There's a channel on Youtube called My Analogue Journey, I usually chuck that on.

Years ago I got a disc called Sounds of Slashdot. It was at a con, I think.
Anyway it's got some "gamemaster" "lost tribe" thing among some musical tracks on the CD. I have No Idea what it is, but I put it on and the sounds fucks with distractions and I can enter the Flow more easily for work. It's a great trigger.
I need to find more of that.

Drum'n'Bass
- Yep. Fast, repetitive, as little vocals as possible.
  Usually I hate that kind of music, but if I want to get things done, Gabber is my drug of choice.

I have an ambient playlist with artists like Carbon Based Lifeforms, Sync24, 36, Cell, and some tracks from video game soundtracks.

Always Emancipator. Safe In The Steep Cliffs is excellent.
- Emancipator fucks heavy. I don't think I've ever heard an artist capture the feeling of misty forests and snow so perfectly. Just nature really. Safe in the Steep Cliffs and Dusk to Dawn are so evocative.
  
  Hell yeah! I learned of them when my partner and I were walking around at a festival, and we passed a stage with the most relaxing music… we just immediately sat down, then laid down in the grass and vibed for a good half hour. Sooooo good.

None. Otherwise, I'm listening to music instead of concentrating on whatever I should be.

Usually none, sometimes classical music, Viennese Classic especially
- Same, none of that low-brow Bratislava Classic, pee-yooo

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.

video game music is designed to pump you up without breaking your concentration.
almost anything with lyrics in it is a no go for me if my goal is to have background music to relax/study to. also lofi.

I like Blue Turtle's playlists, especially the Ithya ones. They're mostly folkish intrumentals and some gentle chillstep

I've had the Billie Eilish's new album on loop recently. But before that I'd usually have some Floyd or god machine on.

I stumbled upon Russian Cybernetics in some google search related to the academic discipline of cybernetics. I like it as background music because it is mostly a very mellow electronic music. And I don't speak Russian, so most of the lyrics aren't distracting and mentally filtered out. Though some songs have english lyrics.

"Elevated Jam Tracks" on youtube (mostly chords and no distracting words/vocals).

If I need to think, I prefer absolute silence (noise cancelling headphones).
If I'm doing something mindless, I'll put on a podcast or audiobook.

I have the ADHD and unless it's a mindless task, I can't listen to music or it makes it much harder for me to concentrate. For anyone else with the disorder, I'd encourage you to at least give it a shot working WITHOUT music and see if it improves your concentration.

Found this playlist on Spotify recently called Creative Flow Music and it is now my go-to.

Soundtracks to puzzle video games. Spacechem and the rest of the Zachtronics games have Great music that helps encourage concentration in my opinion.

Psytrance is ideal. Designed for dancing yourself into a trance, perfect for energetic flow state concentration, like studying.

well not for concentration, but my ambient music is a mix of lemon demon and rain world