APPLIED ACOUSTICS SYSTEMS ULTRA ANALOG Instrukcja Użytkownika Pobierz pdf (Strona 42)

42 Parameters

The effect is obtained by mixing the original signal with delayed version obtained from the output

of delay lines as shown in Figure 21. In the case of a chorus effect, the length of the delay lines must

be short in order for the delayed signals to blend with the original signal rather than be perceived as

a distinct echo. The length of the delay line can be modulated introducing a slight perceived pitch

shift between the voices.

Figure 21: Chorus module.

Tuning

The amount of modulation of the length of the delay lines is adjusted using the Depth knob. In the

left position, there is no modulation and the length of the delay lines remains constant. As the knob

is turned to the right, the length of the delay line starts to oscillate by an amount which increases

as the knob is turned clockwise thereby increasing the amount by which the different voices are

detuned. The frequency of the modulation is ﬁxed with the Rate knob.

The Fat button is used to control the number of voices in the chorus effect. Switching this button

on increases the number of voices. The Spread knob is used to adjust the amount of dispersion of

the different voices in the stereo ﬁeld. When in its leftmost position, there is an equal amount of left

and right output signal on each channel. In other words the signal is the same on both channels. In

its rightmost position, there is complete separation between the channels, the left output from the

chorus is only sent to the left channel while the right output of the chorus is only sent to the right

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APPLIED ACOUSTICS SYSTEMS ULTRA ANALOG Instrukcja Użytkownika Strona 42