Expert Sleepers Warbler v1.1.0 - Manual (Page 12)

this control method, which might seem odd to those used to chorus/flange effects where
you set the delay time in ms directly.
Depth LFO
The Depth LFO modulates the Depth value set above.
It has simple speed and depth controls.
This is most useful when bias (see below) is set to 1.0, though you
can of course use it whenever you like and it will always do some-
thing to the sound.
Shape
The ‘Shape’ knob changes the shape of the LFO waveform. There
are 5 key shapes, and the control blends between them smoothly.
The shapes are
• 0 - ‘Sine’, an ordinary sinusoidal waveform, useful for regular vi-
brato effects.
• 1 - ‘Saw Up’. The pitch rises from a minimum to a maximum value then suddenly falls
back to the minimum.
• 2 - ‘Saw Down’. The pitch falls from a maximum to a minimum value then suddenly
rises back to the maximum.
• 3 - ‘Tri’, a triangle wave. Similar to ‘Sine’ but sounds slightly different.
• 4 - ‘Square’, a square wave. The pitch simply alternates between two values.
The ‘Spread’ knob introduces an offset in the LFO phase for each channel that the plug-in
is processing. In the common case of a stereo plug-in, this amounts to altering the LFO
phase of the right channel.
Since the pitch of the vibrato at any point in time depends on the LFO phase, the spread
control effectively introduces a pitch difference between the channels. This results in a
‘wider’ sound and/or a ‘thicker’ chorus effect (when mixed with the dry signal).
Small spread values on e.g. a Sine waveform give the subtle thickening just mentioned.
You can also use more extreme settings - e.g. a spread of 0.5 on a Square waveform causes
the two stereo channels to ‘mirror’ each other’s pitch.