Hi Nobby. I'm not sure I'm understanding your question but I know General Music makes a pedal for their arranger keybaords that you can program to trigger fills and go to and from different varitions etc. I think its around $200. I'm pretty sure these pedals aren't usable with other brand keybaords. There are midi pedal boards that can send midi messages to control note on note off as well as common channel messages for fills and variations. Your keyboard would have to be able to respond to such messages though.