PG Music has recently launched a major Update of the Band in a box music accompaignment software: version 2009 for Mac. Most impressive new feature is RealTracks: while older versions (version 12, released in 2004) have still used MIDI instruments, the 2009 version comes with a variety of different great sounding tracks and styles. Real instruments, recorded and cut into smaller units of e.g. 4 or 8 bars can be put together by BiaB to complete new changes. So finally, Biab knows how to swing … there is no demo version available, but you can get a brief preview at Youtube.