I suppose it’s true that Apple’s DLS synth can simplify MIDI hookup, but many would say the quality of Apple’s DLS sounds leaves a lot to be desired, and that better software synths are available on the PC -- that, of course, isn’t PG Music’s fault. But the Mac version of BIAB does make it possible to simultaneously route different BIAB parts to several different synths, using Apple’s Core Midi -- which helps if you’ve got a nice sounding piano module, but another synth has better guitar or drum sounds. I was always bewildered that I couldn’t seem to do that in the PC version.