I think their website does a pretty good job of showing what the software can do. Band in a Box is "Auto-accompaniment" software. You type in chords and choose a style and it plays for you. It's very good at doing this with very traditional types of music, so straight ahead rock, jazz, blues it does very well. If you write music that's off the beaten trail, say Peter Gabriel or Frank Zappa like....you probably need to look at a DAW and record your own instruments or use a MIDI controller.
Personally, I've always thought Band in a Box sounded "Canned", although much less so in recent years!
basically what i want to do is to play solo instrumental from music sheets that i have accumulated (bought & free) and use backing tracks from BIAB. just edited by first post. SHARE deleted
Just a note for anyone with iOS devices...there is an app that has been around a long time, called iReal Pro, which basically does Band-In-The-Box functions. There is an online repository with tons of song progressions, or you can create your own. There was a point when you had to buy all of the iReal Pro accompaniment styles, but I think everything comes with the app these days. http://www.irealpro.com
Just for fun, don't forget about Music Memos, on iOS which will transcribe songs you play, add a bass and drums, and also export to GarageBand or Logic Pro. Not the same as iReal Pro, but interesting and FREE.
any other window softwaresimilar to BIAB