[Kevin] has done just that, turning an old telephone into a working MIDI ... A Raspberry Pi Pico was wired in to the phone’s keypad, slimmed down with a hacksaw in order to allow it to neatly ...

We might not be accountants, but there’s something comforting about having the keypad ... on a retro-phone-obsessed coworker, and it worked out pretty well. Starting with an old telephone ...