Fishman AFX Pocket Blender Mini A/B/Y and D.I. Guitar Effect Pedale switch determines the overall behavior when the footswitch is pressed. But that's not all the AFX Pocket Blender also includes clean boost functionality and a classic pocket blender in a small footprint. Without even touching the A B features, it serves as a mini two channel mixer that allows you to connect two audio sources and blend them together. This is perfect for dual source systems such as Fishman soundhole pickups that feature a mic or body