10.6

314Logic Pro Instruments
Filter parameters
• Cutoff knob: Set the cutoff frequency of the lowpass filter. Turn to the left to remove
high-frequency content from the synthesizer signal.
• Resonance knob: Boost or cut the signal portion that surrounds the frequency defined
by the cutoff knob.
Tip: Set cutoff as high as possible, then adjust resonance to achieve a brighter high-
end signal. This is useful for achieving better speech intelligibility.
Logic Pro EVOC20 PolySynth envelopes
EVOC20 PolySynth includes an Attack/Release envelope generator that controls the levels
of the oscillators over time.
Envelope parameters
• Attack slider: Set the time it takes for the oscillators to reach their maximum level.
• Release slider: Set the time required for the oscillators to reach their minimum level,
after the keys have been released.
Logic Pro EVOC20 PolySynth global parameters
The global parameters at the top left of the interface determine the keyboard mode and
number of voices used by EVOC20 PolySynth.
Global parameters
• Poly/Mono/Legato buttons: Determine the keyboard mode.
• When Poly is on, you can set the maximum number of voices in the Voices field.
(When Mono or Legato is on, a single voice is heard.)
• When Mono is on, Glide is always active and the envelopes are retriggered by every
note played (multi trigger behavior).
• When Legato is on, Glide is active only on tied notes. Envelopes are not retriggered
when tied notes are played (single trigger behavior). See Logic Pro EVOC20
PolySynth tuning and pitch controls.
• Voices field: Set the maximum number of voices in the numeric field (only when Poly is
turned on).