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LFO SHAPES (two cycles each)

EXPONENTIAL

The Exponential waveform is not available

on Tremolo and Panner effects.

SINE

TRIANGLE

RECTIFIED SINE

These graphs are of the available LFO shapes for Chorus, Fanger,

Phaser, Tremolo, and Panner effects. The large choice of waveforms

will allow you to select the best possible shape for most applications.

Some may sound bizarre while others sound natural.

If the LFOs are used for time modulation effects (Chorus, Flanger, and

Phaser), the vertical scale shows short to long delay time moving from

bottom to top. When used for amplitude modulation effects (Tremolo

and Panner), the vertical scale shows low to high audio level while

moving in the same direction.

When you compare the each waveform's effect on sound, listen to the

transitions in the top and bottom areas. This is where the differences

are most audible. Some of the waveforms will seem to slow as the

limits are reached, others will seem to rip right through the transition.

Unfortunately, the visual representations of the waveforms don't

always correspond to the expected sound. For example, when the

Exponential waveform is used with a flanger, the effect sounds smooth

and equal, even though its shape looks lopsided (it moves slowly

towards the bottom and quickly towards the top). This phenomenon

occurs because frequency changes at a logarithmic rate (the number

of frequencies double for each higher octave). The Exponential

waveform moves quicker at the high part of its shape and therefore

can sweep through the distantly spaced high frequencies at what is

perceived as a steady rate. The Exponential waveform, by the way,

would look linear (straight) if it were plotted on a logarithmic

(frequency) scale.

If the preceding paragraph sounded confusing, don’t worry–it just had

to be mentioned. The best way to understand the effects of the

different LFO shapes is to try each one with each effect and note the

difference in sound. You will probably find some interesting (and

unexpected) results.

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Art DMV Pro Spezifikationen Seite 54