Stereo Talking Machine
Electro-Harmonix Discontinued Released 2011 · Discontinued 2022

Stereo Talking Machine

Digital envelope-controlled vowel filter pedal with nine selectable voices, true stereo outputs and an effects loop. Aimed at guitarists who want talking, wah-like and Bassballs-style filter sweeps that respond to playing dynamics.

  • Nine selectable voices incl. vowels, Bassballs and wah
  • Attack, Decay and Sensitivity shape the envelope response
  • Nine storable presets with encoder and preset footswitch
  • True stereo outputs plus send/return effects loop
  • Expression pedal input for manual filter sweeps
  • Discontinued in 2022; released 2011
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Description

The Stereo Talking Machine is a digital vocal formant filter in pedal form. An envelope follower reacts to playing dynamics and moves a set of filters, producing vowel-like sounds such as AH-OO and OW-EE, as well as Bassballs and wah-type sweeps. Nine voices are selectable, and each can be shaped with Attack and Decay controls. Sensitivity sets the input level at which the filters start to move and allows both upward and downward sweeps.

Nine preset locations store and recall programs. The preset encoder scrolls through memories, a press-and-hold saves a preset, and the preset footswitch loads the selected one or, when held, opens auxiliary knob editing. A Blend control sets the wet/dry balance.

The pedal has mono/left and right outputs for stereo rigs, plus a send/return effects loop that places other pedals on the filter section without altering the envelope follower's response to the instrument. An expression pedal input allows manual filter sweeps in the manner of a wah. A power adapter is included. Production ended in 2022.

Video

Specifications

Brand
Electro-Harmonix
Model
Stereo Talking Machine
Category
Effects and pedals

Audio

Circuit
Digital
Bypass
Buffered Bypass
Audio
Stereo
Voices
9
Vowel modes
7
Presets
9

Controls

Knobs
Blend, Voice Type, Attack, Decay, Sensitivity (w/ Voice Polarity)
Preset encoder
Scroll, save (hold 3 seconds) and toggle auxiliary functions
Footswitches
Preset and Bypass, each with LED

Inputs

Input
1 instrument/pedal input
Expression pedal input
Yes (EXP PEDAL)
Effects loop return
Yes (SEND / RETURN)

Outputs

Outputs
MONO/L and R
Effects loop send
Yes (SEND / RETURN)
Effects loop
Yes

Power

Power supply
9.6VDC-200mA power adapter included
Current draw
185mA

Physical

Dimensions
5.75 x 4.75 x 2.5 in

In the box

Power adapter
Included

Other

Year released
2011
UPC
683274011165

Data: ehx.com; photos: Electro-Harmonix product page · updated 2026-10-13 · Found a mistake? Write to us