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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@RobertMcReed
Before cutting the headphones wire I was able to plug them in and select them as the mic source.
However, after snipping the wire when plugged in they no longer appeared as a mic choice. The computer did acknowledge that headphones were plugged in (the output pane changed to show headphones rather than built-in speaker), but it doesn’t see it as a mic.
I’m wondering if maybe the MacBook is expecting something that we’re not giving it? Perhaps I need to cut the cable before the Y and connect all of the grounds?
This is maybe a little silly, but I also have a female terminal block trrs audio adapter and an actual oscilloscope. I could try reading the signal on the oscilloscope which should tell us if the wiring / circuit is ok.
If it is, then I would assume that there is something magical that the MacBook is looking for to recognize the line in. It’s clearly looking for more than just a trrs cable plugged in.