My P6 has been working fine until tonight. Whenever I put the Polysix to octave 16' and play the last octave on the keyboard there is no sound, just a little click. This also happens on various other keys on octave 16'. Also for some reason whenever i'm in octave 16' some keys play different sounds (a change in PW). This doesn't happen when i'm using octave 8', and octave 4'. Also I can hear notes on octave 8' all across the keyboard when the pitch bend is all the way down with it's intensity all the way up. Does anyone know what can be the problem? Is there a fix to this....Is there such thing as a 'Synth Technician' that can fix it IF something is definitely wrong?