Pedals and several boards

[Nillerbabs]

Hi there


I'd just like to know if it's possible to have one pedal catering for more than one board, i.e. having a sing controller pedal modulating the volume of two keyboards.
I have a jack splitter myself, so I wouldn't be surprised, if there was also a devide that joined the signals together. If you have any other suggestions for how to do this, please - hit me!

Niels