Apple Logic Express 7 - Manual (Page 56)

56 Chapter 8 Modulation
The modulation section offers two LFOs, featuring individually variable frequencies, and
freely variable mix options (LFO Mix). Additionally, the frequency of LFO 1 can be
modulated by the level of the input signal. Use the Envelope Modulation slider to set
the desired modulation intensity. By staking out the limits of the modulation with its
highest and lowest values, you can determine the modulation width and range. These
high/low limits are controlled by the Sweep Ceiling and Sweep Floor sliders—you can
enter values for them directly in the form of the desired frequency. This value also
determines the maximum intensity of the comb filtering created by the phasing effect.
The Stereo Phase knob is used to define the phase for the left and right channels of a
stereo phaser (s/s). When you’re using a monaural phaser, this parameter is, of course,
meaningless and can’t be set. As the icing on the phasing cake, you can tweak the
Color slider to add just that to the effect. Technically, the comb filtering effect is
amplified via feedback.
If you activate the 001/011 button in the plug-in header, you will have access to the
following six additional parameters:
The Mix slider determines the balance of dry and wet signals. Negative values result in
a phase inverted mix of effect and direct signal. The Phaser’s built-in envelope follower
tracks any volume changes in the input signal, generating a dynamic control signal.
This control signal can be used as a modulation source. Dir.-Env-Mod sets the desired
modulation intensity for the envelope control signal. Warmth switches on an additional
distortion effect, which allows the creation of warm overdrive effects. FB Filter can be
used to activate an additional filter section, which processes the feedback signal of the
Pitch Shifter. This filter section consists of a highpass and lowpass filter, where cutoff
frequency can be set with LP Cutoff and HP Cutoff.