My go to music when working has been lo-fi chillhop. Because they’re 24-hour streams they repeat songs. I’ve also found some beats to be distracting at time, so then I’d have to stop what I’m doing to either stop it from playing or to find something better.

Sometimes I’ll also do ambient sounds, but those can get distracting too. An in-bewteen I found was generative.fm. It give some semblance of music, while also being simple enough that it’s not distracting.

Then when I need something more uptempo, I’ll listen to Lofi Generator which resolves issues I have with the YouTube streams.

There are other services online for music generation. The best usage is for scoring shows or movies, the drawbacks are that you have to pay for them, and from what I can tell they make their money charging for each track they generate. For myself I want an endless loop, so I’ll stick to my free options.