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Chapter 6 Filter eects 12 8
EVOC 20 TrackOscillator analysis in parameters
The parameters in the Analysis In section determine how the input signal is analyzed and used
by the EVOC 20 TrackOscillator.
Analysis In parameters
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Attack knob: Rotate to determine how quickly each envelope follower—coupled to each
analysis lter band—reacts to rising signals.
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Release knob: Rotate to determine how quickly each envelope follower—coupled to each
analysis lter band—reacts to falling signals.
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Freeze button: Turn on to hold—or freeze—the current analysis sound spectrum indenitely.
When Freeze is enabled, the analysis lter bank ignores the input source, and the Attack and
Release knobs have no eect.
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Bands eld: Drag to set the number of frequency bands analyzed and then used by the
synthesis engine. Up to 20 bands can be used.
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Analysis In pop-up menu: Choose the analysis signal source:
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Track: Uses the input audio signal of the channel strip the EVOC 20 TrackOscillator is inserted
into as the analysis signal.
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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.
Use EVOC 20 TrackOscillator analysis in
You should be precise with the Analysis In parameters in order to attain the best possible
speech intelligibility and the most accurate tracking. Follow these tasks and tips to obtain the
best results.
Set Attack and Release times
m 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 eect. 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’s output. A long release time on percussive input signals, such as a spoken word
or hi-hat part, translates into a less articulated vocoder eect. Use of extremely short release
times results in rough, grainy vocoder sounds. Release values of around 8 to 10 ms are useful
starting points.