I was thinking of a steampunk music player using floppy disks: store a 32-bit (4 billion songs should be enough right?) ID onto a floppy, and have a player (it can be a Raspberry Pi with a USB floppy drive) read the ID, lookup the MP3 the ID corresponds to and play the MP3 from an attached storage device.

Because floppies get bad sectors, the ID should be stored repeatedly on it, 4 bytes repeated to fill 1.38 MB should be redundant enough!

I suppose without ID's, one can also store the artist name and song title, and do some text search to find the MP3. Or a YouTube video.