Creating cassette tapes for the ZX Spectrum in the modern era:
http://blog.tynemouthsoftware.co.uk/2017/07/zx-spectrum-tape-master-creator.html
@craigmaloney Storing data as audio is hugely under-rated. Obviously it is not the fastest or most compact approach, but the fact that so much technology is built around voice or music makes it a very versatile/robust one. You can store data on an mp3 player, CD, cassette tape or record, and machines exist to copy data from any one of these to any other. You can transmit data using a mobile phone, landline, payphone, walkie talkie, a bullhorn, or even broadcast it on FM radio!
@solderpunk Totally. Some TV programs at the BBC had BBC Acorn Programs encoded in their audio streams. Was a neat experiment at the time.
@craigmaloney Ah, I didn't know about that! I had heard of radio broadcasts (somewhere in Eastern Europe, I think?) with ZX software on them, but not TV. I still think it's amazing that people were literally wirelessly downloading software in the 80s.