Developer turns floppy disks into secret black-and-white picture canvases — pbm2track "paints" pixel art into the disk's magnetic timing diagram

https://www.tomshardware.com/pc-components/storage/developer-turns-floppy-disks-into-secret-black-and-white-picture-canvases-pbm2track-paints-pixel-art-into-the-disks-magnetic-timing-diagram