10.6

144Logic Pro Effects
Add notes to, or remove notes from, the chosen scale or chord in EVOC 20
TrackOscillator
In Logic Pro:
• To add notes to the scale or chord: Click unused keys on the small keyboard to highlight
them in green.
• To remove notes from the scale or chord: Click selected notes, which then are no
longer highlighted.
Tip: Your last edit is remembered. If you choose a new scale or chord but do not
make any changes, you can revert to the previously set scale by choosing “user”
from the Root/Scale pop-up menu.
Logic Pro EVOC 20 TrackOscillator formant filter
EVOC 20 TrackOscillator features two formant filter banks—one for the Analysis In section
and one for the Synthesis In section. The entire frequency spectrum of an incoming signal
is analyzed by the Analysis section and is divided equally into a number of frequency
bands. Each filter bank can control up to 20 of these frequency bands.
The Formant Filter display is divided in two by a horizontal line. The upper half applies to
the analysis section and the lower half to the synthesis section. Parameter changes are
reflected in the Formant Filter display, thus providing feedback on what is happening to
the signal as it is routed through the two formant filter banks.
Formant filter parameters
• Low and High Frequency parameters: Determine the lowest and highest frequencies
allowed to pass by the filter section. Frequencies that fall outside these boundaries
are cut.
• The length of the horizontal blue bar at the top represents the frequency range for
both analysis and synthesis—unless Formant Stretch or Formant Shift is used. You
can move the entire frequency range by dragging the blue bar. The silver handles
on either end of the blue bar set the Low Frequency and High Frequency
values, respectively.
• You can also drag in the numeric fields to adjust the frequency values separately.
• Lowest button: Switch the lowest filter band between bandpass or highpass mode.
In bandpass mode, the frequencies above and below the lowest band are ignored.
In highpass mode, all frequencies below the lowest band are filtered.