Included in Logic Pro is a vocoder called the EVOC 20 PS (PolySynth), a very hand tool when it comes to audio editing. The EVOC 20 PS is a combination of a vocoder and polyphonic synthesizer, which can be played with an external controller keyboard. But let's concentrate on this video tutorial, where you'll learn how to use and record the vocoder synth in Logic Pro. See the steps below:
1. Create new audio track.
2. Set microphone to input.
3. Create new software instrument.
4. Set instrument input to EVOC 20 PS (stereo).
5. Select a preset; Electric Vocoder.
6. Select "input 1" from the Side Chain menu.
Then start experimenting! Follow along with the video to see what goes on next.