Bernie, that DM48 looks way cool! How do you like it?
It is a quality controller all the way. I simply chose R2 on the Pa4X,Sx900,or SD40,and it comes through like a champ. Other users don't have access to keyboards,and consequently,the many great sound choices. For non compliant devices I use my Kenton Midi USB host.
For me,it allows for more realistic playing on strings,sax,etc,but allows me to play most anything by ear. For some reason,I have always been able to play most anything on harmonica. It even sounds great for piano and guitar,mono or poly.