You can easily connect your existing pedals (I use Casio SP3), buttons, switches etc to your Kinesis Advantage2 keyboard.
Connector type is RJ14 - looks like phone RJ11, but with 4 conductors.
| pin | colour | switch | default action | 
|---|---|---|---|
| 2 | black | left | tab | 
| 3 | red | middle | keypad (shift) | 
| 4 | green | common | |
| 5 | yellow | right | keypad enter | 
Actions could be redefined (see User's Manual).