CDs are just shiny punch cards with a fancy reader.
I mean I suppose technically SSDs are just collections of punch cards written in silicon read electronically...so super fancy reader #everythingispunchcards
@scottgal It’s just punch cards all the way down. lol. going to be thinking about that for a few days. forget string theory, i like punch card theory better. or maybe the strings were always just punch cards …

@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.

@damieng Punch cards didn't either in the latter days they included error correction too :) Hamming's code was one of the precursors of the reed-solomon codes used in cds https://thatsmaths.com/2015/09/24/hammings-smart-error-correcting-codes/
Hamming’s Smart Error-correcting Codes

ThatsMaths
@scottgal CDs are just records with light instead of needles.
@lengau Oh records are so much cooler records are a direct reflection of the vibrations which came from the instruments they were created from. Listening to a vinyl from the 1940s connects you directly to the room it was recorded in :) All the variations in the vinyl were caused (directly) by the air moving in that room 80 years ago!
@scottgal
Somewhere I have some of my grandfather's aluminium records... I should find those...
@lengau Just reminded me of music boxes! These were totally a kind of proto-punch card! Maybe #everythingispunchcards should be #everythingismusicboxes :)

@scottgal
Music boxes are just binary wax cylinders 😜

Oh, and storage disks (hard disk & floppy disk) and tapes are just magnetic punch cards. #DataStorageIsBoringlyFascinating

@kathan there's really only so many ways to store binary data. I could say 'cds like punch cards are a physical, persistent representation of binary data which can be read by decoders and used to feed data to computers' but it didn't seem as funny :)
@scottgal Definitely not as funny.
@scottgal or is it morse code for coherent light? or is it braille for tiny laser fingers?
@scottgal ...but if you drop them, you don't have to sort them. πŸ™‚