Alesis Wedge Reference Manual page 50

Overview of Effects – Chapter 5
Examples: Chorus Room, Flng Dly Rm, etc.
In the case of Multi Chain Configurations, the "Mix" parameter of each effect
determines what the following effect receives at its input(s). Example: It is possible to
use the "Delay Room" Configuration (where effect 1 is a mono delay and effect 2 is
a reverb), and have only the dry, uneffected signal going to the second effect; this is
done by setting the first effect's Mix parameter to 000% (this means none of its output
can be heard nor is sent to the second effect in the chain).
Wedge Reference Manual 43