@gruber I disagree with your post about the AirPod sounds. Back in 1986, while working for a startup late at night, I needed a cable to use a modem. I had to make one from alligator clips by trial and error, the Mac had a proprietary connector and the pin-outs weren't documented. Also, at the same time, I fought for weeks to resolve a "bug" trying to import a complex Autocad drawing dxf file into a desktop pub app. There was an undocumented 32K byte memory limit in the OS.