Use something mellow in a different language from your own, it is less distracting.
I like to listen to brasilian Bossa Nova like this Getz/Gilberto Album
Or something without lyrics like Yiruma if you like Piano music.
In a Space Outta Sound by Nightmares on Wax
Robot Science
I like listening to video game music when studying. I heard somewhere that game designers use their music to keep you playing their game and lose track of time and hyper focused.
I do this!
Jan Garbarek - Visible World
Anything by Kiasmos. Also Chopin.
Anything from Hammock. The older albums mostly.
Battlestar Galactica OST by Bear McCreary
Little Songs About Raindrops - Lullatone
I just added a bunch of classical to a playlist and then removed the occasional piece I found distracting. I still use that playlist when I need to focus.
Every album by the band Can
I was introduced to them & Cabaret Voltaire around the same time (~100yrs ago). Both are still golden.
I like any of the Nujabes albums. He makes chilled, mainly instrumental, hip hop music.
Anything by Erang. If you are into medieval mythical themed hymns.
Any rando lofi channel on YouTube/Spotify/Online Radio Stations
I think this is a really good answer. Just search for a focus playlist on whatever platform and let it run.
If I’m picking out music more specific, I find myself thinking about that, and what it’s like, and if it’s helping, and maybe I should hey this other album or artist.
Don’t let picking the music distract too much from focusing on what you want to do.
Bit of of left field here: The going under OST. Was the soundtrack to my exams