hiya, am interested in connecting my Key Rig 49 to the sp404sx.

I'm just wondering if:

there is someway to convert this:

-(the usb out/the end on the right in the pic) http://www.shop.ca/c/hosa-cable-hosa-us ... QgodySMAkQ

into

-(Midi in) of the sp404sx

I've done some digging on google but most of the references are pretty vague. Has anyone done this?