Older (i.e. 2000s and early 2010s) hypnotic techno. I do 30 mins of deep breathing exercises 3 times a day, while listening to it, to try and maintain a sense of calm throughout the day.
Realise my music choice probably isn’t what most people would classify as “chill”. I mainly listen to electronic music so I find it easy to lose myself into the extremely repetitive percussion and melody.