Month: July 2014

Failure: playing video from audio cassette

The idea for this project came from a few different places: Curiosity about how cable modems actually transmit ones and zeros along the coax cable. This led to some reading about the various modulation methods used. Code I’d written to read the data on cassette tapes containing files from the Dragon 32 computer of my youth. (Including this one.) The modulation here is fairly simple, being one cycle of a certain tone for a ‘0’ and one cycle of a different tone for a ‘1’. Some fairly superficial reading about video codecs. I wondered what could be achieved with cable-modem-style modulation techniques in the way of putting data onto audio cassette tapes. In particular: could you read enough bits per second

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