CDs are just shiny punch cards with a fancy reader.
@scottgal The 1's and 0's stored on media do not map directly to the binary in the files you store though!
On floppies for example there are approved bit-sequences to ensure timing is kept and that the signal is not too weak or strong in any one part. Those on-media bit sequences map to a shorter bit sequence in file.
@scottgal
Music boxes are just binary wax cylinders π
Oh, and storage disks (hard disk & floppy disk) and tapes are just magnetic punch cards. #DataStorageIsBoringlyFascinating