Alesis S4 Plus Reference Manual page 146

What's New in the 2.0 "Plus" Upgrade: Appendix D
by a Chorus effect, which can be either a Mono Chorus, Mono Flange or Resonator.
The Chorus is then followed by a Delay effect, followed by a Reverb effect, followed
by a Lezlie.
The Overdrive effect can be edited by selecting the Misc. Function while in Effect Edit
Mode. The Lezlie effect can be found on Pages 3 and 4 of the Pitch Function.
Note: The Overdrive effect is achieved partially by overloading the effect's input. This
naturally would set off the [CLIP] LED unnecessarily, making it impossible for it to
show when real clipping is occurring elsewhere in the Effects Configuration.
Therefore, the [CLIP] LED will be disabled whenever this Configuration is used.
Lezlie Effect is Now in Stereo
In Effects Configuration #3, the Lezlie effect now runs in stereo for an even more
realistic simulation of a rotating speaker system.
Tip: For maximum effect, turn the Sound's output off. This is done in Program Edit
Mode by setting either the Sound's or Channel's "Output" parameter (Program Edit
Mode or Mix Edit Mode, Level Function, Quad Knob [3]) to "OFF", depending on
whether you are editing a Program or a Mix.
In the same Configuration #3, the Delay effect's "Input" on Send 1 (Effects Edit Mode
with Configuration #3, Send 1, Delay, Page 1, Quad Knob [1]), is now a mix control
between the Send 1 signal and the Lezlie's output signal, instead of just a Lezlie
output signal level. When this parameter is selected, the upper display will show
"SEND<00>LEZLIE"; this parameter can be set between <99 (Send 1 only) and <00>
(equal blend of Send 1 and Lezlie output) and 99> (Lezlie only).
Flanger Shape
The Flanger effect's "Waveform Shape" parameter (Effect Edit Mode, Delay Function,
Page 2, Quad Knob [1]) now provides only a triangle type wave but with two different
types to choose from: "Normal" and "Invert". The "Invert" setting provides a more
dramatic flange effect.
Effect Configurations 1 and 3, Send 3 Pitch
In Effects Configurations 1 and 3, the Pitch Function on Send 3 now has only one
page and is permanently set to Resonator. Mono Chorus and Mono Flange are no
longer selectable. This sacrifice was made in order to improve the quality of the other
effects in these Configurations.
S4 Plus Reference Manual 145