Here it is, finally, the American Loopers Aux Switch that can control pretty much anything on the Boss DD500, RV-500 MD-500. With our switch, you can assign any of the two switches in any combination to do:

Bank Up
Bank Down
Fade In 
Fade Out
Loop On/Off
Loop Clear
Effect SW
Roll 1/8 1/4 1/2 
Momentary
Twist
Warp
Hold (freeze)
Tap
 
It doesn't get any more creative than that!    

This switch will also work with Boss MS3 as well.

* You will need a TRS Cable, please see the cables category.

* Boss DD500 Not included