[aamargulies]

Grey Matter Response reverse-engineered the DX7 with a logic probe to create their E! product:

https://www.muzines.co.uk/articles/grey-matter-response-e/20...

E! was so good that Yamaha suspected them of industrial espionage.

A logic probe.

[fsckboy]

not pointing any fingers at all, except to point out that if you engaged in industrial espionage you would undoubtedly then come up with a plausible cover story and hope nobody probed the logic of it too much

[ShadowBanThis01]

I see what you did there, and raise you an octave.

[ajxs]

Reverse-engineering a binary is hard enough in 202x with modern tooling. Doing what they did back in the 80s is truly impressive!