Star Trek as well. And the data even got decoded. By software. In 1989.
Money quote:
[Bob] didn’t own his own Cray 2 of course, this particular computer was property of the National Security Agency (NSA). He received permission to test Frequency Shift Keyed (FSK) decoder algorithms. Can you guess what his test dataset was?
Try some signals from here:
The FSK ones are the best. Try some with slower symbol rate and limited number of symbols; they can be surprisingly melodic. E.g. the CCIR Selcall or CCITT. Or the CIS 20-MFSK XPA, that one sounds like the soundtrack to old C64 BoulderDash game. Or Contestia. Or DominoEX/DominoF. Or generally anything that has the waterfall plot looking like a punchcard.
