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