Slammi Plus Pitch Shifter / Harmony Pedal



This polyphonic powerhouse flawlessly transposes your pitch in two different directions over a +/- 3 octave range: transpose up, down or both, simultaneously! Staggering whammy effects and dive bombs, bends, harmonies, cross-fades between your dry and transposed sounds, cocked pitch shifting... this pedal does it all.

The 11-position Shift switch selects the maximum transposition starting with D (Detune), a shift of 17 cents that creates a chorus or doubling effect. This table details the pitch effect relative to the original note.



The Dual setting outputs two pitch-shifted signals. The first follows the Shift knob as if in UP mode. The second transposed signal depends on whether the Slammi Plus is set to Pitch or X-Fade.

In Pitch mode the secondary shifted signal bends at the same rate as the primary signal. The primary and secondary intervals are as follows:



When in X-Fade mode, the secondary signal is set by the Pitch Mix knob and does not bend. The interval choices are in half-step increments up to +/-1 octave. The volume of the secondary signal decreases by sweeping the pedal from heel to toe.

Featuring a rugged, lightweight design with a traditional rack and pinion style operating mechanism, the Slammi Plus is your ultimate polyphonic pitch shifter harmony pedal.

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Quick Specs
- Flawless, glitch-free transposing over a +/- three octave range
- Three shift modes: up, down and dual
- Dual pitch shifting mode where the Slammi Plus generates two separate pitch shift intervals simultaneously
- An X-Fade function where the pitch shift interval is fixed (does not bend) and the foot pedal cross-fades between your dry note and pitch shifted note or cross-fades from one pitch shifted interval to another
- Fully polyphonic all the time
- More flexibility in setting the heel position’s pitch shifted interval
- A Blend control that lets you fine tune the wet/dry mix
- Runs on battery or most 3rd party power supplies including the EHX9.6DC-200mA PSU
- Rugged, weight saving chassis with a traditional rack and pinion style operating mechanism
From the Blog
Posted 12/22/2017


EHX’s six new Performance Series pedals sound great and deliver outstanding value! The Performance Series includes the Wailer Wah, Cock Fight Plus Wah and Talking Pedal with Fuzz, Slammi Plus Polyphonic Pitch Shifter/Harmony Pedal, Expression Pedal, Dual Expression Pedal and Volume Pedal.

Click here to watch the Performance Series demo videos.

From the Blog
Posted 10/16/2017


Electro-Harmonix introduces the Slammi Plus Polyphonic Pitch Shifter / Harmony Pedal featuring glitch-free pitch shifting over a +/- three octave range and with the ability to transpose up, down, or both simultaneously. An 11-position Shift switch selects the transposition interval starting with



Detune for a chorus or doubling effect and includes the following: Minor 2nd, Major 2nd, Minor 3rd, Major 3rd, Perfect 4th, Perfect 5th, Major 6th, 1 Octave, 2 Octaves and 3 Octaves.

The pedal’s Dual Mode outputs two separate pitch-shifted intervals simultaneously and provides 11 unique interval combinations. The Slammi Plus also features an X-Fade function where the pitch shifted interval is fixed (does not bend) and the pedal cross-fades between the player’s dry note and pitch shifted note or cross-fades from one pitch shifted interval to another.

The Slammi Plus is fully polyphonic at all times and provides enhanced flexibility in setting the heel position’s pitch shifted interval. A Blend control is also included that allows the user fine tune their wet/dry mix.

The Slammi Plus comes with a 9 Volt battery and also accepts most 3rd party power supplies including the optional EHX9.6DC-200mA PSU.



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