Wow! This fixed it! It was the “Enable Audio Enhancements” that was getting in the way. When I unchecked this box, and restarted Audacity, it now recognizes the Instrument 2 from UM2 on both the Mono and Stereo settings. The 48,000 Hz setting was not an issue. I left it at 48,000 Hz because the UM2 documentation said it supports that.
I noticed that your screen capture with the arrows did not include an “Enable Audio Enhancements” check box option - so you may want to make note of this for any future posts with a similar problem for UM2 recording on Instrument 2 channel.
Thanks so much Steve! Thanks for sticking with me and getting me through this!
- Kevin (Another completely delighted Audacity customer)