I sometimes listen to the theme tune of the C64 game Platoon. Repetitive enough to bring you into the zone
Discussion
Google now ...
"The first casualty of war is innocence"
I like it , its funky.
The other one is the last ninja. I got permission from the creator to have it as the hold music on our old telephone system about 20 years ago. I’ll try and dig it out
This particular one for platoon:
https://youtu.be/awghpZ-bavc?si=n6L_dz9V3TMjb5r9
This one for the last ninja;
You can download a SID player and play it on loop. If I need to get through some drudgery this will not distract but will enhance