Detail 01
Harmony machine
Generates additional vocal parts above or below what you sing, so one singer covers a backing arrangement.
Product detailSKU #1274034486387
Electro-HarmonixVoice Box Harmony Machine/Vocoder
1/5
Independent shopping perspective
The Korena take
Vocal pedal that adds harmony parts and vocoder effects to a singer, tracking pitch from a guitar input. For singer-guitarists building parts live.
Strong match
Who this is for
- Solo singer-guitarists who want two- and three-part harmony live
- Adding a vocoder line without a keyboard rig
- Small-venue acts with no backing vocalists
Consider the trade-offs
When to look elsewhere
- Guitar-only players; this processes a vocal signal
- Anyone needing studio-grade transparent pitch correction
- Pedalboards without a mic input and PA path
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Vocoder
Imposes your vocal formants on an instrument signal. Robotic, talk-box-style voice from your guitar.
Detail 03
Takes a mic and a guitar input
The instrument signal supplies the harmony notes. Your playing decides the chord the harmonies follow.
Detail 04
Signal processor, not an amp pedal
Output goes to a PA or mixer channel, not into a guitar amp input, or the vocal loses clarity.
Detail 05
Floor pedal format
Switching happens with your foot mid-song, so harmony parts drop in and out without touching a mixer.
Final check
Know before you order
- 01Microphone, mic cable and PA channel are not included
- 02Needs a guitar signal feeding it for harmonies to track chords
- 03Larger footprint than a standard pedal; plan board space
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Do I need a guitar plugged in?
For pitch-tracked harmony, yes. The instrument input tells the pedal what chord you are on so the generated parts fit. The vocoder likewise needs an instrument signal to shape.
02Can I use it with a keyboard instead of guitar?
Any instrument-level signal into the instrument input can supply the harmony notes. Keyboards work; match levels and use a DI if the output is line level.
03Does it fix my pitch?
It is a harmony and vocoder pedal, not a corrective tuner. Generated parts follow the instrument, but your own lead vocal passes through as sung.
04Where does it connect in a live rig?
Mic into the pedal, pedal output into a mixer or PA channel. Keep it out of the guitar amp path so the vocal stays clean.
