Flange; Lezlie; Stereo Pitch Shifter; Pitch - Alesis 4 Reference Manual

Overview of Effects – Chapter 3

Flange

This is a mono, less processor intensive version of the Stereo Flange, used in the
Multi Chain Configurations Flange->Realroom, Realroom->Flange and Flange->Dly-
>Room; the Double Configuration Realroom+Flange; and the Dual Mono
Configurations Flange:Flange and Flange:Delay. The effect of mono flanging is
achieved by splitting and slightly delaying one part of the signal, then varying the
time delay, with an LFO. The delayed signal is then mixed back with the original
sound to produce the "swishing" or "tunneling" sound.

Lezlie

With the Lezlie effect (found in the Lezlie->Room Configuration), the pitch change
block becomes a rotating speaker simulator. This effect was extremely popular
during the 1960's and was achieved by mechanically rotating the speakers to produce
complex timbral changes. The Lezlie speaker system is most often used with rock
organs, but is occasionally used for guitar amplification as well. Parameters include:
Motor on/off, Speed, which can be slow or fast; and High Rotor Level, which lets
you attenuate the volume of the high frequencies. When switching the Lezlie effect
on and off, or when changing the speed between fast and slow, the effect will ramp
rather than change abruptly, just as a true Lezlie speaker system would do. By
raising the High Rotor Level, you can really make this effect scream. Tip: Try
modulating the Motor or Speed with aftertouch.

Stereo Pitch Shifter

The Pitch Shifter effect transposes the pitch of the incoming signal by a fixed amount.
It is useful for creating parallel harmonies, detuning, chorusing, and special effects.
The Semi parameter shifts the pitch in increments of one half step, with a range of up
or down one octave. The Fine parameter detunes the signal in very fine increments,
with a range of up or down one half step. Also available are Delay and Feedback
parameters. The Delay parameter delays the shifted signal up to 250 ms, or can be
used with the Feedback parameter to produce decaying arpeggio effects. There are
also Low Cut and High Cut filters in the feedback loop which can be used to alter the
timbre of the sound as it repeats. The Stereo Pitch Shift configuration provides two
discrete pitch shifters, each with their own Pan and Level control.

Pitch

This is a less processor-intensive version of the Pitch Shifter effect, used in the Multi
Chain Configuration Pitch:Delay, and the Dual Mono Configuration Pitch:Pitch.

Auto Pan

The Auto Pan effect alternates the loudness of the signal in opposite channels at a
definable rate. Low and high frequency cutting is available, and (like the flange
effects) can be triggered by the input signal (either the left or right input, or both).
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