I think for people that want to go full software...
Biab adds enormous depth...
its also great to play piano on those backings..
But sadly it still hasn’t a relatime mode, which follows realtime played chords..

So you would have to use t together with Varranger, for real time played backings
Where sadly Varranger misses out on my beloved multipads..
But then thats where a software setup shines..
You could use reason to fill in all the possible blancks.
And even combine wth hardware like a motif xs rack for the great yamaha arps..

And if .. varranger wold work on Mac, you could even use mainstage for your keyboard parts..

All in all, things will get pretty complex quite fast if you want to get all things possible out of a software setup..



So maybe its better to just use all the software on top of a standard arranger..
i think biab adds a lot of great stuff to any arranger..
But do you need it? Espescially with the pa4x allready having a chord sequencer?
No, but its great fun to play around with..
But then i haven’t used my copy of biab in years...
I think i am, still on version 2012 windows, from before switching to mac..
I allways get the feeling the mac version trails behind the windows version..

But if it would offer a realtime chord detection mode, amd an option to import/convert 3rd party styles, i would even comsder it instead of the pa4x... i think its that good.