Alesis QuadraSynth Plus Reference Manual page 135

Editing Effects: Chapter 7
is similar to a block diagram for a mixer, with signal moving generally
from the left to the right. The number next to each function name
represents one of the four effect sends. For example, Delay 2 refers to the
Delay effect on effect send 2.
This Configuration #1 provides three Pitch effects, four Delay effects and
one Reverb effect. The Pitch effects are found on effect sends 1, 2 and 3,
but while the Pitch effects on sends 1 and 2 are stereo and their types are
selectable (Mono Chorus, Mono Flange or Resonator), the Pitch effect on
send 3 is mono and can only be used as a Resonator. Effect send 4 has no
Pitch effect.
Each of the four sends has its own Delay effect, but while the Delay
effects on sends 1 and 2 are stereo, the Delay effects on sends 3 and 4 are
mono.
Each effect send can be routed through the Reverb. Since there is only
one Reverb effect, it is found in the first effect send (see next section on
Reverb). Reverb parameters that set the sound of the reverb itself (such
as high and low decay, reverb type, predelay, etc.) are found only when
"EDITING: 1" is displayed. However, each of the 4 effect sends has
controls for how much dry signal and how much effected signal are sent
to the Reverb effect.
Example: The Reverb 2 block allows you to send signal to the reverb from
four different points in the second effects chain: a) directly from effects
send 2, b) the output of Pitch 2, c) the input of Delay 2, or d) the output
of Delay 2. You can even send a combination of these to the reverb. But
to change any other reverb parameters, you must return to editing
Reverb 1.
Each Pitch, Delay and Reverb module has its own independent Mix
output level (i.e., how much of their output is routed directly to the Main
Left and Right outputs). The Mix function is where you determine how
the effects will actually be heard.
Mix 1, for example, is where you can control the outputs of Pitch 1,
Delay 1, and Reverb 1 to the main outputs. The Mix parameter controls
how much an effect block feeds directly to the main outputs, but doesn't
control how much it feeds to any other blocks that may follow it. For
example, when Pitch 1's Mix control is set to 0, it is still available as an
input to Delay 1 and Reverb 1.
Think of the Mix function in the QuadraSynth Plus's effects section as
being similar to the effect return control on a mixing console. For
example, if Effect Send 1's Mix Reverb Output parameter is set to 0, you
won't be able to hear reverb regardless of how much input you feed it
from any of the effect buses.
QuadraSynth Plus Piano Reference Manual 136