Creative 0404 Owner's Manual Page 48

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5 - Effects
Core Effects Descriptions
40 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.
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.
Env. Attack Time Sets the starting rate of the “wah” sweep.
Env. Release Time Sets the ending or release rate of the “wah” sweep.
Sweep Range Controls the amount of “wah” sweep
Center Frequency Sets the initial bandpass filter frequency.
Bandwidth Sets the width of the bandpass filter.
Center
Frequency
Auto-Wah Filter
Attack Release
Sweep Range
Bandwidth
Envelope
Sensitivity
Input
Wave
Envelope Follower
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