LinPlug Spectral - Manual (Page 70)

Phaser
The Spectral’s Phaser can be used to create swirling dynamic movement in
sounds. The Phaser effect is created by automatically sweeping a series of
equally spaced frequency notches up and down the audio spectrum.
The Center dial is used to set the frequency around which modulation
occurs.
The Stages dial sets the number of stages in the phaser. Each phaser
stage shifts the signal's phase by 180 degrees. The higher the Stages
setting, the more frequency notches there are in the signal and so the more
pronounced is the phasing effect.
The Feedback dial is used to set the amount of internal feedback employed
within the phaser. More internal feedback produces increasingly
pronounced resonant peaks.
Use the Stereo control to widen the stereo image. If it's set full left the
modulation on the left and right channel will be in perfect synchronization.
At full right setting the left and right channel will be completely out of phase,
creating an extreme stereo effect. The best (rather subtle) stereo effect is
achieved with settings around the mid mark.
The Rate dial sets the rate at which the signal is modulated. The Rate
display also word as a Sync popup menu (see Appendix A for the range of
possible sync settings).
The Depth dial is used to set the intensity of the modulation.
The Invert button allows you to invert the phase of the effects signal to
obtain a different sound, depending on the audio signal fed into the phaser.