Interesting thing about fish, they don't hear like we do. Their sensitivity to sound differs from species to species. It depends on the proximity of the inner ear to the swim bladder.
So, while some fish are quite sensitive to sound and you need to be cautious, others wouldn't necessarily mind your choice of music.
75: blood parrots, featherfin cat, emperor tetras, turquoise rainbowfish, BN plecos, japanese trapdoor; 46: WCMM, gold inca snails, ghost, bamboo & amano shrimp, kuhli loaches, rummynose & ember tetras, endlers, platies, flame gourami, guppies; 16: pygmy, peppered, loxozonus corys, otos, assassins, RCS ... ~ Research PRIOR to purchase.... ~