Subscription libraries are convenient, but they are not the only way to build a personal music collection. The resources below cover a wide spread: Chinese pop and general music search engines, classical score archives, Western music discovery sites, and generators for rain, forest, ocean, and other background sounds. Some are direct download pages, some are search front ends, and some are archives of public-domain or freely licensed material. Links can go offline or change their rules, so treat this as a map rather than a guarantee.

General music and pop

Classical music, scores, and instrumental collections

Western music and discovery

Ambient, nature, and background sounds

Before downloading or reusing anything, check the site's current terms and the license attached to the recording or score.