This is for an art project, but I want the science to be solid.
I'd like to be able to display an arbitrary data file (actually looking to contain a sound file, but don't want typical audio graphs). My first though was something like a QR code but they are limited to a few thousand bytes of information which is a 3 orders of magnitude lower than I need.
I'd like the method of display to be lossless and something that could (at least in theory) be retrieved from a printed image.
Is there anything like this out there?