Shows it in action recording, which I am sure is the primary purpose, but not necessarily if the bits in the stack can be used for pass through.
Since screen burn in is a thing on the Mac Plus, I am now imagining a fully blank sscreen with a single window (no desktop or menu bar kind of like After Dark blanking) that moves over time while it displays audio-in. If a live oscilloscope kind of view isn’t possible, I wonder what it would take to have the Mac record n-seconds of audio and just display it and then dump the last recording and make a new one, so it would be “audio snapshots” instead of something live.
Since this is about analog-to-digital, I wonder if there is some older Vernier Corp A/D stuff that can be used (I have some in a storage bin with my eMates). I’ll check.
Sometimes I can’t turn my brain off with this stuff.