Bass AND percussion.

I use the 13 note Roland pedals with T2 and/or {PA2XPRO to play all kind of stuff especialy timpany and other percs. And you can use it for arranger functions as well (vars, breaks, fills, endings, next registration etc)
Unbeleivable power to have that 3rd keboard (up to 32 notes or more on some orgns)

Lee S.