10.6

139Logic Pro Effects
Logic Pro EVOC 20 TrackOscillator analysis in controls
The parameters in the Analysis In section determine how the input signal is analyzed and
used by EVOC 20 TrackOscillator.
Analysis In parameters
• Attack knob: Determine how quickly each envelope follower—coupled to each analysis
filter band—reacts to rising signals.
• Release knob: Determine how quickly each envelope follower—coupled to each analysis
filter band—reacts to falling signals.
• Freeze button: Hold the current analysis sound spectrum indefinitely. When Freeze is
enabled, the analysis filter bank ignores the input source, and the Attack and Release
knobs have no effect.
• Bands field: Set the number of frequency bands analyzed and then used by the
synthesis engine. Up to 20 bands can be used.
• Analysis In pop-up menu: Choose the analysis signal source.
• Track: Uses the input audio signal of the channel strip the EVOC 20 TrackOscillator
is inserted into as the analysis signal.
• SideCh(ain): Uses a side chain as the analysis signal. You choose the side chain
source channel strip from the Side Chain pop-up menu in the upper-right corner
of the plug-in window.
Note:
If Side Chain is chosen and no Side Chain channel strip is assigned, the EVOC 20
TrackOscillator reverts to Track mode.
Set Attack and Release times in EVOC 20 TrackOscillator
• In Logic Pro, rotate the Attack and Release knobs to set times that provide the most
articulated sound.
Longer attack times result in a slower tracking response to transients—level spikes—
of the analysis input signal. A long attack time on percussive input signals, such as a
spoken word or hi-hat part, translates into a less articulated vocoder effect. Set the
Attack parameter to the lowest possible value to enhance articulation.
Longer release times cause the analysis input signal transients to sustain for a longer
period at the vocoder output. A long release time on percussive input signals, such as
a spoken word or hi-hat part, translates into a less articulated vocoder effect. Use of
extremely short release times results in rough, grainy vocoder sounds. Release values
of around 8 to 10 ms are useful starting points.