Having just aquired a second hand kn5000 I have come accross a problem probably some thing simple when selecting right hand 2 and right hand one to layer the sounds the right hand 2 seems to be out of tune with right hand one.
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Gem Wk4, Solton Ms60, Technics Kn5000, Korg Pa50sd, Yamaha Psr k1, Tyros 4, Korg Pa700