10.6

Table Of Contents
304Logic Pro Instruments
EVOC 20 PolySynth
EVOC 20 PolySynth and vocoding
Logic Pro EVOC 20 PolySynth overview
EVOC20 PolySynth combines a vocoder with a polyphonic synthesizer and can be played
in real time.
It can create classic vocoder sounds, made famous by groups such as Kraftwerk during
the 1970s and 1980s. Vocoding remains popular in current electronic, hip-hop, R&B, and
other music styles.
EVOC 20 PolySynth “listens” to an incoming audio signal—typically of a spoken or sung
performance—and imposes the sonic characteristics and level changes of this signal onto
the integrated synthesizer.
When you play notes and chords with your MIDI keyboard, the internal synthesizer “sings”
at the pitches of incoming MIDI notes, but with the articulations—level changes, vowel and
consonant sounds—of the incoming audio signal. This results in the classic “singing robot”
or “synthetic voice” sounds that vocoders are mainly known for.
EVOC20 PolySynth can also be used as a synthesizer, or it can be used for more subtle
effects processing—such as the creation of relatively natural-sounding vocal harmonies
from a solo voice performance. Not limited to vocal processing, you can also achieve
interesting results by processing other audio material, such as drum or instrument loops.
To use EVOC20 PolySynth, you need to insert it into the Instrument slot of an instrument
channel strip. You also need to provide an audio signal as the analysis audio source, via a
side chain.
Set up EVOC20 PolySynth in Logic Pro
1. In Logic Pro, insert EVOC20 PolySynth into the Instrument slot of an instrument
channel strip.
2. Choose an input source from the Side Chain pop-up menu in the plug-in header. This
can be an audio track, live input, or bus, depending on the host application.
The EVOC20 PolySynth is now ready to accept incoming MIDI data and has been
assigned to an input, audio track, or bus—via a side chain.
3. If applicable to your host application and needs, mute the audio track serving as the
side chain input, start playback, and play your MIDI keyboard.