Plug your drum pads, mesh head drums into this controller. No need for drum module. Use the Guitar Hero World Tour Drum Tuning Kit to adjust the sensitivity of the drums.

The Purple jack on bottom of controller is for the bass pedal. You may need a 1/8" to 1/4" adapter for the bass pedal connection.

 The controller also includes the midi port for use with an electronic drum kit.

Some drum pads may still be over sensitive even when using the tuning kit to adjust the sensitivity to the lowest settings.

Here is a simple circuit using a couple of 1/4" jacks and a 100k linear pot.  You could build a separate project box for the jacks and Potentiometers, or if your building you own GHWT box just add the Potentiometer to the ghwt controller's box.