GigRig Quartermaster QMX-10 The Simple loop switching for your pedals Each loop has a push-button next to the loop return that gives you the option to turn a standard loop into a flip/flop loop. Instantly switch between any selected loops while adding other loops on top. It's great if there are effects on your board that you never stack like multiple delays or drive units. By using the QMX returns as instrument inputs you can easily and quietly switch between your favourite guitars For your simple compact board, TheGigRig QuarterMaster QMX just makes life that little bit easier.