E-Mu PX-7 Owner's Manual page 209

MIX OUTPUT
Global
Menu
channel 01: Preset
Next set the Mix Output routing in the preset to the desired output (for
each layer). Yes, you can send each layer to a different send if you want.
L1
Preset Edit
Menu
Send 2
By sending different amounts of presets to the effects, subtle or striking
effects can be achieved using the two effect processors. This feature allows
you to get the most out of two effects since you can have eight different
mixes.
For more information, refer to the diagram on the following page or, See
"Mix Output" on page 150.
MIX OUTPUT
Programming Basics
Stereo Mix Outputs
PX-7 Owners Manual 197