Keep in mind that whey using multiple pedals, at least on most Yamaha machines, some of the pedals that connect together will not function because of grounding conflicts. Some of the Boss pedals, for example, that are made of anodized aluminum and slide together side by side, are grounded to the cases. Consequently, when connected to the keyboard's pedal inputs, and two separate functions are selected, the floating ground connections of the input jacks become one connection. Consequently, neither pedal will function. Several individuals discovered this the hard way.

The only workaround for this is to separate the pedals, mount them on a non-conductive panel using Velcro, and wallah, everything will work just tine.

Cheers,

Gary