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Tremolo Parameters Adjust

Rate -

Sin/Ramp Lfo -

This control sets the amplitude modulation rate.

From 1 to 8 Ramp, From 9 to 16 Sin

Chorus Parameters Adjust

Rate - This control sets the amplitude modulation rate.

Sin/Ramp LFO - From 1 to 8 Sin, From 9 to 16 Ramp

c. Flanger

b. Chorus

Fixed Delay

Var Delay Line

LFO Sin/Ramp

Analog Input (Direct)

Input

Analog Mix

Effect

Delay

Var Delay Line

LFO Sin/Ramp

Regeneration %

Input

Analog Mix

Effect

The Chorus effect tries to recreate the illusion of more than one instrument from

a single instrument sound. Two musicians playing the same instrument never

play in perfect unison (both time and pitch wise). In order to build up the proper

illusion using an electronic device, the original sound is summed with a slightly

delayed and detuned version of itself. Instead of a constant pitch deviation, more

natural results come from a varying pitch deviation (two players never keep con-

stant their relative pitch distance). Verb's algorithm implements the variable

delay and the detuning of it is modulated by an LFO (low frequency oscillator)

which causes the detuning to vary. The direct sound and the detuned one are

summed analogically on the outputs.

The flanger started its life as a mechanical realization: two identical tapes were

run in parallel while a human operator randomly controlled the speed of each

unit, making minor variations up and down the nominal tape speed. Mixing the

sound from both tapes, the signals sometimes aligned in phase, while other ti-

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