Just an image to show how to wire ganged switches as an alternative to using a potentiometer with an Arduino, or similar. This allows the user to instantly jump to a desired setting/option with precision. Here are some ganged switches (the six blue buttons) to select patterns on a build of jan ostman's O2 Minipops drum machine: The dark grey button to the left selects between banks for a total of 12 patterns. Note: A simpler (but less speedy) option would be to use a rotary switch. As in the build below: