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If you want to go a bit off-piste, 20th and 21st century liturgical choral music is an excellent choice.

As a bonus: gigs are free and in most cities happen every night (at evensong, which also comes with free mindfulness and meditation sessions, as well as a chance for a singalong with the crowd.)

The choirs range from school and college scholarship level to outright professionals and they will often have albums where you can explore their repertoire, and branch off from there. In essence: they put together the need-to-know pieces on your behalf, which assists massively in increasing buff-level.

I find the ensemble of male voice to also be incredibly relaxing:

https://open.spotify.com/track/12hKtoAt7uiDgqIzrqWWr4?si=O8d...