Sound Recorder app

I think I missed something somewhere. I have working USB audio and I have the Sound Recorder app (thank you Renate!). Today my little mic arrived. I started things going, checked to make sure the USB audio device was recognized, plugged in the mic and started the Sound Recorder app.

"No device"

So.......I'm guessing that there is something over and above what is required for audio that I have missed somewhere?