Hi Earl, I used a Korg Pa4X arranger for many years. I also used BiaB way back and only recently got back in to using it. The results I got were far beter than anything I could do with the Pa4X and in the end I sold it, bought a decent master keyboard and buried deeper in to BiaB. Now using BiaB Mac 21 along with Logic Pro X the results I now get are so much more professional. I am still pretty new to BiaB but a lot of the members on these forums really are exceptionally knowledgable and are more than happy to help you out with anything that gets you stumped.