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Table Of Contents
182 Chapter 14 The EVOC 20 PS
Freeze
The Freeze button holds the current Analysis sound spectrum infinitely.
The frozen Analysis signal can capture a particular characteristic of the source signal
which is then imposed as a complex sustained filter shape on the Synthesis section.
Using a spoken word pattern as a source, for example, the Freeze parameter could
capture the attack or tail phase of an individual word within the pattern—the vowel a,
for example.
With Freeze engaged, the Analysis filter bank ignores the input source until it is
disengaged.
Another use of the Freeze parameter (which can be automated) could be to
compensate for people’s inability to sustain sung notes for a long period, without
taking a breath. If the Synthesis signal needs to be sustained, when the Analysis source
signal (a vocal part) isn’t, Freeze can be used to lock the current formant levels (of a
sung note)—even during gaps in the vocal part—between words in a vocal phrase.
Note: When the Freeze parameter is used, the Attack and Release parameters have no
effect.
Bands
The Bands window determines the number of frequency bands used by the
EVOC 20 PS. It ranges from 5 to 20.
The greater the number of bands, the more precisely the sound can be reshaped. As
the number of bands is reduced, the source signal’s frequency range is divided up into
fewer bands—and the resulting sound will be formed with less precision by the
Synthesis engine.
Note: Increasing the number of Bands also increases the processor overhead.
You may find that a good compromise between sonic precision—allowing incoming
signals (speech and vocals, in particular) to remain intelligible—and resource usage, is
around 10 to 15 bands.