Thanks for the suggestion. I checked, and my meters are set to the 72dB range. I selected a few other settings while doing a test recording, and still no waveform, no audio actually recorded.
I also supplied a new audio feed into the computer (using a source I was 100% sure was feeding audio, just to rule out any sort of a cabling problem), and still nothing.
Maybe there’s a simple reason why this is happening, but I’m still trying to figure it out!
David