Did you see that performance? Was he using a breath controller? Did it look like he had the 2 hooked up to interact? You're talking FM synthesis so it's which algorithm(s) rather than which waveform...also the DXs modulations can be varied widely and more than one can control the same thing. Go back to Harmony Central reviews and read the reports on the DX100 and DX21(functionally the same) then try to find a website for Troutman or the band (use something besides Yahoo- I tried that already) have fun.mn