User Manual

Core Avid Audio Plug-Ins
997
Signal Generator (RTAS and AudioSuite)
The Signal Generator plug-in produces audio test tones in a variety of frequencies, waveforms,
and amplitudes. The plug-in has the following options:
Envelope
Follower
Causes the selected effect to dynamically track the input signal by varying with the amplitude
envelope of the audio signal. As the signal gets louder, more modulation occurs. This can be
used to produce a very good automatic wah-wah-type effect. When you select the Envelope
Follower, the Mod Amount slider changes to a Mod Slewing control. Slewing provides you with
the ability to smooth out extreme dynamic changes in your modulation source. This provides a
smoother, more continuous modulation effect. The more slewing you add, the more gradual the
changes in modulation will be.
Sample+Hold Periodically samples a random pseudo-noise signal and applies it to the effect frequency. Sample
and hold modulation produces a characteristic random stair-step modulation. The sampling rate
and the amplitude are determined by the Mod Rate and Mod Amount controls, respectively.
Trigger+Hold Trigger and hold modulation is similar to sample and hold modulation, with one significant
difference: If the input signal falls below the threshold set with the Mod Threshold control,
modulation will not occur. This provides interesting rhythmic effects, where modulation occurs
primarily on signal peaks. Modulation will occur in a periodic, yet random way that varies
directly with peaks in the audio material. Think of this type of modulation as having the best
elements of both sample and hold modulation and with an envelope follower.
Mod Amount
and Mod Rate
These two sliders control the amplitude and frequency of the modulating signal. The modulation
amount ranges from 0% to 100%. The modulation rate, when LFO or Sample+Hold are selected,
ranges from 0.1 Hz to 20 Hz. If you select Trigger+Hold as a modulation type, the Mod Rate
slider changes to a Mod Threshold slider, which is adjustable from –95 dB to 0 dB. It determines
the level above which modulation occurs with the trigger and hold function. If you select
Envelope Follower as a modulation type, the Mod Rate slider changes to a Mod Slewing slider,
which is adjustable from 0% to 100%.
Output Meter The Output Meter indicates the output level of the processed signal. Note that this meter
indicates the output level of the signal — not the input level. If this meter clips, the signal may
have clipped on input before it reached Sci-Fi. Monitor your send or insert signal levels closely
to prevent this from happening.
Parameter Description
Option Description
Frequency Sets the frequency of the signal in hertz. Values range from a low of 20 Hz to a high of 20
kHz.
Level Sets the amplitude of the signal in decibels. Values range from a low of –95 dB to a high
of 0.0 dB.