Thanks again.
Muting and unmuting during a solo is not acceptable solution for me. The phrases are interrupted.
It's all very confusing. This style already contains a soloist track when you load it, yet apparently there is no option to configure it.
The only availabe option is to select and generate *another* soloist, then two of them play at the same time, over the entire song, which is even worse.
Regarding interrupted phrases when using the (F5)Bar Settings to mute/return to normal search the RealTracks Picker to see if your version of BIAB contains RT 1152:Silence.
RT 1152 is a special RealTrack unique to the BIAB main program for muting the original Legacy tracks so the BIAB algorithm is aware to mute the desired track sections as it is selecting RealTrack data. Using RT 1152 across the bars to be muted, causes BIAB to treat these bars as a different instrument and will play silence. This prevents abrupt endings and beginnings of phrases.
Access this feature using the RealTrack Picker Dialog. There are 8 settings to program instrument changes and each of the Legacy tracks has 10 slots for instrument changes. Any RealTrack, in any combination, can be used in these slots. For instance using different RealTrack instruments for each slot and for each track results in 70 instruments in a single 32 bar Chorus. A result of 35 changes is possible using only 2 instruments.
RT 1152 can also be manually set anywhere using Bar Settings Dialog and the RealTrack Button.
I've attached a screenshot of the 8 settings and another screenshot showing a 3 chorus song with the middle chorus muted using RT 1152.