5 - Effects

Core Effects Descriptions

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.

Envelope

Sensitivity

Input

Wave

Auto-Wah Filter

Center

Frequency

Bandwidth

Sweep Range

 

 

 

 

Attack Release

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

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Creative Professional

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Creative 0404 owner manual Auto-Wah Filter

0404 specifications

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