5 - Effects
Core Effects Descriptions
66
Creative Professional
Auto-Wah
This effect creates the sound of a guitar wah-wah pedal. The “Wah” filter sweep is
automatically triggered from the amplitude envelope of the input sound. Auto-wah
works well with percussive sounds such as guitar or bass.
The Auto-Wah is a bandpass filter whose frequency can be swept up or down by an
envelope follower, which extracts the volume contour of the input signal. The
Envelope Sensitivity setting allows you to properly set up the envelope follower to
receive a wide variety of input signals. This “envelope”, or volume contour, controls the
frequency of the bandpass filter so that it sweeps up and down with each new note. The
Attack controls the rate of the note-on sweep. As the input sound fades away, the filter
sweeps back at a rate determined by the Release setting.
The wah direction allows the filter to be swept either up or down in frequency. Use a
higher Center Frequency setting when the wah direction is down.
Center
Frequency
Auto-Wah Filter
Attack
Release
Sweep Range
Bandwidth
Envelope
Sensitivity
Input
Wave
Envelope Follower
Parameter
Description
Wah Direction
Allows you to sweep the wah up or down.
Env. Sensitivity
Controls how closely the wah sweep follows the input signal.
Range: -12dB to +18dB
Env. Attack Time
Sets the starting rate of the “wah” sweep.
Range: 0ms to 500ms
Env. Release Time
Sets the ending or release rate of the “wah” sweep.
Range: 10ms to 1000ms
Sweep Range
Controls the amount of “wah” sweep. Range: 0% to 100%
Center Frequency
Sets the initial bandpass filter frequency.
Range: 80Hz to 2400Hz
Bandwidth
Sets the width of the bandpass filter. Range: 1Hz to 800Hz