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Table Of Contents
Chapter 6 Filter 85
Max Track
This parameter cuts the high frequencies of the analysis signal, making the pitch
detection more robust. Should the pitch detection produce unstable results, reduce the
Max Track parameter value to the lowest possible setting.
Formant Filter
The Formant Filter Window
The Formant Filter window is divided into two sections by a horizontal line. The upper
half applies to the Analysis section and the lower half to the Synthesis section. Changes
made to the High/Low frequency parameters, the Bands parameter or the Formant
Stretch and Formant Shift parameters will result in visual changes to the Formant Filter
window. This provides you with invaluable feedback on what is happening to the signal
as it is routed through the two formant filter banks.
High/Low Frequency
The blue bar shown just beneath the EVOC 20 TO logo is a multi-part control which is
used to determine the lowest and highest frequencies allowed to pass by the filter
section. The length of the blue bar represents the frequency range for analysis and
synthesis. Frequencies of any audio input which fall outside these boundaries will be
cut. All filter bands are distributed evenly across the range defined by the High/Low
Frequency values.
To adjust the low frequency value, simply click-hold on the silver slider to the left of
the blue bar, and drag to the right (or left). The value range is 75–750 Hz.
To adjust the high frequency value, simply click-hold on the silver slider to the right
of the blue bar, and drag to the left (or right). The value range is 800–8000 Hz.
To adjust both sliders simultaneously, click on the area between the slider halves
(directly on the blue bar) and drag to the left or right.
You can make changes to the High/Low Frequency values directly by using your
mouse as a slider on the numerical entries—80 and 8000 Hz in the diagram.