You don't need anything to slit a signal fed to the Eventide. Infact its internal routing allows you to route any input to any or all DSPs inputs as you like.
Ive been attempting to do this routing to no avail, miv>pre>analog 1 input and am trying to send that same signal to four main inputs so quadrupling the same input so I can make use of the multichannel effects, any advice on how to do this? Yesterday I tried changing firewire inputs 1-4 to analog 1-4 but that did not work. Keep in mind the only way I can connect to my computer right now is through firewire, thats why I thought I might need a mixer or something, was not sure if I could do the routing I need while using the firewire connectivity.