Everything on this site that someone else made, and where it came from.
The cassette in the corner plays three tracks for each page. All come from OpenGameArt under CC0 or CC BY. CC0 needs no credit, but everyone is credited anyway.
Changes: each track was re-encoded to MP3, loudness-matched and given a short fade at each end. JRPG Piano is its short loop played four times. Nothing else was altered.