Applied Acoustics Systems Chromaphone 3 Upgrade Acoustic Object Synthesizer Plug-In (Download) - Manual (Page 54)

54 The Editor View
5.4.5 Chorus
The chorus effect is used to make a source sound like many similar sources played in unison. It
simulates the slight variations in timing and pitch of different performers executing the same part.
The effect is obtained by mixing the original signal with delayed version obtained from the output
of delay lines as shown in Figure 28. 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 28: 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