Oooh, flashback to early TRS-80 days - there was an on-motherboard relay to control the tapedeck (pause/continue transport, you still had to have the buttons pu

Oooh, flashback to early TRS-80 days - there was an on-motherboard relay to control the tapedeck (pause/continue transport, you still had to have the buttons pushed down.) You could instead drive it fast enough to make (very grating) tones, probably damaging it over time (your limiting factor was "everyone in earshot trying to make you stop", by "grating" I mean "small metal box full of bees" :-)