Thanks. Much appreciated. I had typed the question into the BIAB chatPG and it gave me this.

Would this work to do what I am describing?

1. **Selecting RealTracks for a Track** (Chapter 6: Making Songs)

First, select the track for which you want to add a RealTracks sound. For example, if you want to add a RealTracks sound to the Guitar track, right-click on the Guitar track button and choose "Select a RealTracks for this Track" from the menu. Alternatively, you can select the Guitar track and then press the [RealTracks] button on the main screen.
2. **Playing the Music Keyboard with RealTracks**

Once you have selected the RealTracks for the track, you can start composing music using your music keyboard. The RealTracks will play the selected instrument parts as you play on your keyboard, allowing you to compose and arrange your music in real-time.