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Table Of Contents
80 Chapter 6 Filter
 Click the value below the word Scale to display the Root/Scale pop-up menu.
 Choose the scale or chord to use as the basis for pitch correction from the pop-up
menu.
 Set the root key of the respective scale or chord by vertically dragging the Root
parameter, or double-click and enter a root between C and B. The Root parameter
is not available when the Root/Scale value is chromatic or user.
 You can add notes to the chosen scale or chord by clicking keys on the small
keyboard, and remove notes by clicking notes already selected. Selected notes
appear bright green. Selecting any notes sets the Root/Scale value to user.
 Your last edit is remembered. If you choose a new scale or chord, but do not make
any changes, you can jump back to the previously set user scale.
You can automate the Root and Scale parameters and the keys of the onscreen
keyboard in Logic Express.
 Max Track value field: Sets the frequency above which the high frequencies of the
analysis signal are cut, 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 Section
The parameters in section control the two formant filter banks of the
EVOC 20 TrackOscillator.
 Formant Filter graphic display: Shows the frequency bands for the analysis and
synthesis parameters.
The Formant Filter display 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 display. This provides you with invaluable feedback on what is
happening to the signal as it is routed through the two formant filter banks.