Hi Chas:
I sometimes use a really good Vocalist/Producer who uses BIAB with real authority... coupled with other trade secrets... to demo some of my songs I am incapable of vocalizing properly. Old frogs tend to "croak" and I am an old frog! LOL!
After discovering him and his work... it made me wonder if I would not have made a better decision to explore BIAB and other alternatives to an Arranger. I never perform and songwriting is my primary interest. One thing is certain, the Yamaha PSR-S970 is a really good machine for what I do... but it has bells and whistles I'll never learn to use due to time constraints.
Hint: My wife keeps scheduling me to go to the tailor to have my burial suit altered! LOL!
Regards, ----Dave Rice