Hi!
I play the Abacus professionaly for more then a year now and I have posted info about it some times before.I still use version 3.30 and not 4.1 which is the current,but I plan to upgrade (in January hopefully).I have also promised to put some MP3s and I will do it when I find some time.
Its not an expensive keyaboard;its a cheap studio.And second to none for live applications.