Name 

Description 

Flanger 

 
Flanging is an audio effect produced by mixing two identical signals together, with one signal delayed by a small and gradually changing period, usually smaller than 20 milliseconds. This produces a swept comb filter effect: peaks and notches are produced in the resultant frequency spectrum, related to each other in a linear harmonic series. Varying the time delay causes these to sweep up and down the frequency spectrum
 
The scheme of FIR flanger
 
The difference equation is y(n)=x(n)+ax(n-D(n)), where
 D(n)=d/2(1-cos(2pFn)), F - deviation speed (about 1 Hz), d - deviation rate.
The modulation of... more 

Phaser 

 
A phaser is a sound effect used to filter a signal by creating a series of peaks and troughs in the frequency spectrum. The position of the peaks and troughs is typically modulated so that they vary over time, creating a sweeping effect. For this purpose, phasers usually include a low-frequency oscillator.
 
Structure
 
The Phaser uses a series of variable all-pass phase-shift networks, which alter the phases of the different frequency components in the signal. These networks pass all frequencies at equal volume, introducing only phase change to the signal. Human ears are not very responsive to... more 

Chorus 

 
A chorus effect occurs when individual sounds with roughly the same timbre and nearly (but never exactly) the same pitch converge and are perceived as one. While similar sounds coming from multiple sources can occur naturally (as in the case of a choir or string orchestra), it can also be simulated using an electronic effects unit or signal processing device.
 
 

 
Chorus Controls
 
Waveform
Sets the waveform shape Sine or Triangle of the LFO.
 
Dry/Wet mix
Sets the ratio of wet (processed) signal to dry (unprocessed) signal.
 
Depth
Sets the percentage by which the... more 

Gargle 

 
The gargle effect modulates the amplitude of the signal.
 

 
Phaser Controls
 
Waveshape: Sets the shape of the modulation waveform.
 
Frequency: Sets the rate of modulation, in Hertz.