"Am I expecting too much of BIAB here? " Yes. This is a RealBand solution. Reaper nor Sonar will save the day here.

In BIAB, using F5 only mutes or unmutes the existing audio. Reaper and Sonar only manipulate the audio that is there.

RealBand changes the audio.

Once you have the correct key issue resolved, try this:

1. Create your song in BIAB as normal. At this point you can either create a solo track or wait to do so in RB. I suggest you create the solo from within RB.
2. Save the song.
3. Either export your tracks to a folder and import them into RB or open the sgu file in RB. Save this as a RB seq file.
4. I will explain this as if you want your soloist to do fills and a solo break or two.
5. select the bar or bars where you want your soloist to be heard for the first time. Your selection should include the bar(s) for the length of time to be played.
6. Right click and select multiriff. Select your soloist if necessary. Generate the multiriff.
7. Select your favorite generated part from the seven possibilities. (for simplicity, we will assume you do not want to make your fill by editing more than one part into a single part. That is also possible.)
8. Proceed to the next area where your soloist will be heard and select the length of bars to cover the length of time he will play.
9. Repeat 6 and 7 and 8 for this selection.
10. Repeat 9 for the remainder of the song at each place where you want your soloist heard and make your selection for the length of time accordingly.

I created my soloist track this way in my last User Forum song post, "Say I Do". The track contained 18 selected areas of varying length for a total 126 unique,individual choices. It is not nearly as daunting a task as it sounds and only took a few minutes to complete.

There are additional alternatives you can try if you still aren't happy with your solo but try this and ask here on the forum if you need more help.

BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.