The Phaser effect is a guitar effect that distorts the sound by playing back a band-filtered copy of the original signal with a delay.   
The following setting options are available in the Modulation area:
Drop-down menu
Modulation Function

Provides different signal forms.

Slider
Frequency

Specifies the frequency of the copied signal.

The following setting options are available in the Settings area:
Slider
Lower Limit

Specifies the lower limit of the frequency band.

Slider
Upper Limit

Specifies the upper limit of the frequency band.

Slider
Bandwidth

Indicates the bandwidth of the signal.

Check box
Stereo Flanger

Gives the processed part of the audio file a more “stereo-like” sound

The following sliders are available in the Mix area:
Dry Signal

Mixes the original signal with the edited copy, indicating the intensity of the original signal.

Effect

Mixes the original signal with the edited copy, indicating the intensity of the edited signal.

 
Frequency
The frequency denotes the oscillations per second of an electrical or magnetic field. With audio files this means that the frequency increases with rising pitch. The unit is Hertz (Hz). The highest magnitude of oscillation is called the amplitude.


Phaser