What Pedals work with the XW-series Casio SP-20 Casio SP-3R Pedals from Kurzweil and Korg also work as well as the switchable M-Audio, Roland and Yamaha will not.   Can I used the Solo Synth and Hex Layers, or Drawbar organs at the same time No, only one of them can be used at a time on Zone 1.