The Walrus Audio Polychrome Analog Flanger is a flanger pedal from Walrus Audio, described by the maker as a uniquely colorful tool for adding modulated textures to songs, like the Iguana that's malleable to its environment1. Walrus Audio's product page lists it at $219.99 USD2, and the pedal currently shows as sold out there, with a blemished listing whose marks are cosmetic only, such as scratches or dents in the finish of the pedal1.
Controls
The Polychrome's layout is built around a blend knob, a feature it shares with the other members of the Walrus Audio modulation family1.
| Control | What it does |
|---|---|
| D-F-V (Dry, Flange, Vibrato) | Blends the dry and delayed signal from full dry at minimum (no effect), to traditional flange at noon, to full pitch vibrato at maximum1 |
| Voice Switch | Selects between two flanger voices: down is more traditional and full frequency, up is a more complex and notched flange effect with less low end1 |
| Shape Switch | Selects sine, triangle, or random LFO wave to modulate the delay line1 |
The D-F-V knob is the heart of the pedal. At minimum you hear only your dry signal, at noon you get a traditional flange, and at maximum the effect moves into full pitch vibrato1. For a dedicated vibrato sound, Walrus Audio suggests setting the D-F-V knob to maximum, feedback to a minimum, and the Voice switch up1.
Voice and shape options
The Voice switch gives the Polychrome two distinct flanging characters. The down position is the more traditional, full frequency voice; the up position produces a more complex, notched effect with less low end1. Combined with the three LFO shapes on the Shape switch (sine, triangle, or random), that gives a wide range of modulation textures from a compact analog pedal1.
Power and hardware
The Polychrome runs on 9VDC and draws a minimum of 50mA13. A power supply is not included, and the power jack is mounted on top of the pedal alongside the input and output jacks1. Bypassing is handled by a soft switch with relay bypassing, and the pedal is true bypass1.
The Polychrome draws at least 50mA at 9VDC13. Check that your power supply output can cover that before adding it to a daisy chain.
The diecast enclosure measures 4.77" x 2.6" x 2.3" and comes in flat black with purple, yellow, coral, green and white ink, featuring original artwork by David Hüttner1.
Availability and the Blemished version
Walrus Audio has offered a Blemished version of the Polychrome, where the blemish is cosmetic only, such as scratches or dents in the finish of the pedal1. As of October 2026, the Blemished listing on the maker's site shows as sold out1.
What reviewers said
Walrus Audio's product page lists the Polychrome at $219.99 USD2, and the pedal currently shows as sold out there, with a blemished listing whose marks are cosmetic only, such as scratches or dents in the finish of the pedal1. The maker describes it as a uniquely colorful tool for adding modulated textures to songs, like the Iguana that's malleable to its environment1, and its Shape Switch lets you select from sine, triangle, or random LFO wave to modulate the delay line1.
Where it sits among flangers
The Polychrome is one of the all-analog flangers in the wider field of flanger pedals, which runs from compact units like the Mooer E-Lady and Ibanez Flanger Mini to larger feature-rich pedals like the Electro-Harmonix Deluxe Electric Mistress and the Boss BF-3 Flanger. Its blend knob approach ties it to Walrus Audio's own modulation family rather than to the classic flanger designs it sits alongside1.
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Questions
Is the Walrus Audio Polychrome true bypass?
Yes. Walrus Audio lists the Polychrome as true bypass, and it uses soft switch relay bypassing. The pedal is all-analog, and the input, output and power jacks are all top-mounted so it fits cleanly on a pedalboard.
Does the Polychrome come with a power supply?
No. Walrus Audio states that a power supply is not included with the Polychrome. The pedal runs on 9VDC and draws at least 50mA, with the power jack mounted on top of the enclosure.
How much current does the Polychrome draw?
Walrus Audio specifies a minimum current draw of 50mA at 9VDC. That is worth knowing when planning a daisy chain or isolated power supply, since some low-output supply taps may not comfortably cover it.
Can the Polychrome do vibrato?
Yes. Walrus Audio suggests setting the D-F-V knob to maximum, the feedback to a minimum, and the Voice switch up for pitch vibrato. The D-F-V blend runs from full dry at minimum, through traditional flanging at noon, to full pitch vibrato at maximum.
What does the Voice switch do on the Polychrome?
The Voice switch selects between two flanger voices. In the down position the flanger is more traditional and full frequency. In the up position it is a more complex, notched flange effect with less low end.
Sources (3)
- Voyager Preamp/Overdrive, Walrus Audio
- Walrus Audio offers a spectrum of colourful modulation options with the Polychrome analogue flanger, musicradar.com, 2021-05-11
- Polychrome Analog Flanger, Walrus Audio
