To help you find the relevant paper or information, could you clarify:
Because ".7z" is a file extension for compressed data, this file could be: sleep.music.7z
If you can provide the or the website where you encountered the file, I can locate the exact documentation for you. To help you find the relevant paper or
A curated library of ambient, binaural, or White Noise tracks intended for sleep therapy or personal use. sleep.music.7z