At its most basic level, iRig KEYS PRO really is just a larger version of iRig KEYS, with all of the same features and a bigger footprint. The major difference is that with iRig KEYS PRO, IK Multimedia decided to sacrifice the prior model’s uber-portability in order to provide a set of full-sized keys—a reasonable compromise in our opinion that makes iRig KEYS PRO much more usable for traditional keyboard players. This version measures…