George,

I checked again last night and George is correct as usual. The click does not go away with the Yamaha expression pedal backed all the way off. I must be nuts. Maybe I had my aftermarket expression pedal between the output of the keyboard and my amp. I'll try to see if this method works over the weekend. I'm also going to try the Yamaha pedal again just to verify that I'm nuts. I really ought to have a X1.