Electro Harmonix Pico Intelligent Harmony Machine
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Electro Harmonix
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From the original IHM to the "pico" format
The Pico IHM condenses the spirit and algorithm of Electro-Harmonix's famous Intelligent Harmony Machine into a miniature chassis. It retains the same diatonic harmonization approach that tracks your notes in real time to generate musical and accurate voices, but in a housing designed for modern, crowded pedalboards.For whom and which styles?
Rock, metal, pop, country, or worship soloists, this pedal is ideal for thickening a lead, simulating a 12-string guitar, doubling riffs in thirds, or crafting "twin guitars" lines. Its precision makes it equally credible in studio and live settings, from subtle melodic parts to heroic solos.Features designed for the stage
Set the key with the KEY potentiometer and the "#" button (natural or sharp mode), choose among 10 interval modes via INTERVAL, blend your signal with MIX, and adjust the overall volume with VOL. Hold "#" to activate Dual Mode, which layers two harmonized voices for instant guitar choirs. The buffered analog bypass secures your signal in long effects chains, and the "pico" footprint fits anywhere.Sound
The Pico IHM favors clean, musical, and stable harmonies, with a clear attack and natural note sustain. Tracking is fast and precise, without pumping or glitches, delivering singing thirds reminiscent of "twin leads," sharp fifths, or full octaves to thicken your instrument. Transparent when blending with MIX, it lets your playing and dynamics breathe while adding width.Technical specifications
| Effects | Octaver / Harmony, Effects | Type | sector |
| Technology | Digital | Use | electric guitar |
| Format | Pedal | Color | Grey |
| 10 intervals | lower octave, lower sixth, lower fourth, lower third, upper third, upper fourth, upper fifth, upper sixth, upper seventh, upper octave | Output | 6.35mm mono jack (output impedance 680 ohms, max level +2.1 dBu) |
| Dual Mode | predefined interval pairs (e.g., lower octave + upper octave, lower sixth + lower fourth, upper third + upper fifth, etc.) | Required power | 9 V DC (center negative) |
| Potentiometers | KEY, INTERVAL, MIX, VOL | Consumption | 100 mA |
| "#" Button | toggles natural/sharp + activates Dual Mode (status and key LED) | Enclosure dimensions | approx. 93 x 51 x 51 mm (3.65" x 2.0" x 2.0") |
| Input | 6.35mm mono jack (input impedance 2.2 M-ohms, max level +1.5 dBu) | ||
Questions frequently asked
What harmony intervals are available?
The 10 offered intervals cover the lower octave, thirds, fourths, fifths, sixths, and seventh, up to the upper octave. The INTERVAL setting selects the harmonized voice according to the chosen key.
How does the Dual mode of the Electro Harmonix Pico Intelligent Harmony Machine work?
Holding down the “#” button activates Dual Mode. Predefined pairs of intervals are then layered, such as a lower octave with an upper octave or a higher third with a higher fifth. The LED indicates the status of this mode and the selected key.
What power supply is required for this pedal?
A 9 V DC center-negative power supply is required, with a current draw of 100 mA.
Can the Pico IHM be used in a compact pedalboard?
Its enclosure measures approximately 93 x 51 x 51 mm. The buffered analog bypass is designed to preserve the signal in long effect chains.
What connectivity does the Pico IHM offer?
The input and output use 6.35 mm mono jacks. The input has an impedance of 2.2 M-ohms and the output an impedance of 680 ohms.



