Ron and Mac, thanks for your replies. I'm making some progress. One of the things I was wondering about was how to get a reset to RB's original settings, and you've answered that for me. Also I tried Mac's 3 settings and I am now able to get both playback and realtime sound generation using ASIO, although only with the "ASIO DirectX Full Duplex" driver. I'm not even sure where this driver came from. The latency is still very bad with realtime input, however, and it certainly would not be adequate for serious realtime midi recording. The latency thing is new to me as I have not been involved in computer-based recording before, and it's frustrating. I thought that using a DXi synth, combined with an ASIO driver, would make it acceptable, but so far not. Any suggestions on the latency issue?

Seems I should be able to use ASIO4ALL, and I can get it to install, but I get no sound with it. After installed, when I click on the "ASIO Drivers Control Panel" in the Drivers window, I get a pop-up RB-generated message saying: "Audio and/or DXi Output will be silent - the ASIO4ALL driver is not connected; likely due to your using a soft-synth (like GS-Wavetable) for MIDI".
When I then try to play back a midi sequenced song, I can see by the VU meters that there is sound output happening, but I hear nothing. I get another pop-up RB-generated message saying: "Note: ASIO4ALL is not able to output sound - This usually means it can't do so at the same time as your MIDI driver, so you likely need to choose another MIDI driver to get ASIO4ALL working, and then reboot machine". So I try doing that, and still get no sound.

Maybe, as Mac says, I'll have to acquire a suitable usb sound card in order to get things working properly.

Terry

BIAB/RB 2018 PlusPak. Dell Inspiron23 running Win10, 12GB RAM, 2.5GHz i7, Presonus AudioBox USB interface.