I'm not sure if you care for death metal, but Allegaeon released Elements of the Infinite last year which contains several songs about cosmology and mathematics. One, in particular, is entitled "Dyson Sphere"[1].

While we're on the subject of Dyson Spheres, Alkaloid released a four part song earlier this year on their debut, again entitled "Dyson Sphere". My interpretation is that it's about a sphere created in order to serve as an incubator for an entire species. All of the parts are available on their Bandcamp page[2].

[1] https://www.youtube.com/watch?v=hVGcwoqgbyE [2] https://alkaloid-band.bandcamp.com/album/the-malkuth-grimoir...