I have found that the expression pedal is probIematic with the 560. My EV -5 didn't work all.. So, I purchased a VOX V845... and ran it thru a direct amp out of my guitar voice and there I got really loud awesome Jimmy Hendrix style wah sounds. But, it doesn't work when run thru the controller/pedal choice/ cc expression.
I purchased a yamaha pedal that sort of works.. Has the TRS Jack... It wahs... on some of the instruments but it is very soft... and can't be turned up.
I will try the EV-5 one more time... After that I have to consider that the 560 has other great qualities and expression pedal isn't it.
I have listened to Martin's use of a pedal and it does sound great. So, something else is going on here, that he isn't talking about. Like, extra amping from somewhere or extra powered monitors, or something. Because I never ever got that kind of response from using the assign jack and controller assigns for the pedal. Even my Clavi 1 straight out of the box, doesn't sound like his. So, maybe each unit sounds and works better and better as they come off of the assembly line. I did see one of his demos where the expression actually didn't work.. I think I own one of those units.
Maybe one day they will put out an upgrade in the programming of this unit and make them perform like they tells they will. and add a lot of the things the users have been asking for. Or, I have a novel idea... How about Casio just make an expression pedal that works with it's keyboards... Wow,, what an idea. Make one...
From some of the first ever watches and hand calculators to now dipping their feet in with the big boys on music, I think Casio could figure out how to make the correct and fabulous working Expression pedal... That with program upgrades and they really have something here.
But, alas, it's already been what 5 years out with the 560 and no Expression Pedal by Casio.. What are you waiting for?
I use the trio of pedals for keyboard sustain damper, they work just fine.. Hey Casio,, be brave.... Make the expression pedal already and stop frustrating the owners of the 560.