Microphone audio waveform or level meter. Might help diagnose when your own microphone is off/muted/low/high/distorting during a video or audio call/conference. (Speaker meter on one side, your own mic meter on the other?)
(I needed a reminder of the appearance, from Input Modules)
LED Matrix module image (9×34 white greyscale LEDs)
RGB Macropad image (4×6 RGB LEDs)
