The Dtronics DT-RDX is a hardware controller for the Yamaha Reface DX. With all its parameters the FM synthesis is a challenge control.
The DT-RDX has all parameters directly accessible with its 41 knobs and 9 switches.
All you have to do is select the desired operator. You can also edit multiple operators with the same parameters at the same time.
The controller is mounted on a stylish holder.(included).