> That's nothing.
>
> I saved specially designed images to tape to try to reverse-engineer the 
> algorithm for turning colours into tones. I figured out that if you save 
> in image composed of horizontal bands of colour, the tape contained a 
> series of long, continuous tones, and they changed order depending on 
> which colours you used.

Have you ever heard of sing-song?

This was a C64-program that played a tune on your floppy by repositioning 
the read/write head.

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