The Vongon Polyphrase is a stereo echo and looping device inspired by early proto-digital delays of the 1970s, like the Lexicon Prime Time1. It carries two delay lines that can be used in stereo or stacked in mono, and Vongon says it is capable of everything from rich, dubby rhythmic repeats to metallic resonant flanges1. What sets it apart from most echo pedals is that the delay lines can be locked into an infinite feedback loop, which lets the pedal generate loops as long as 22 seconds1.
The pedal is currently listed as sold out at $449.00 USD, with orders shipping November 2026 from the USA1.
A stereo echo and looper modeled on 1970s proto-digital delays
The Polyphrase's design reference is the Lexicon Prime Time, one of the early proto-digital delay units of the 1970s1. Pedal of the Day's review describes the result as a stereo echo and looping device built around that lineage, with delay times from 5 milliseconds to 22 seconds, infinite feedback and MIDI control2.
The long delay ceiling is what makes the looping function possible. Where a conventional delay pedal tops out at a second or two of delay time, the Polyphrase's 22-second maximum means a single delay line can hold a phrase, and the infinite feedback setting keeps it circulating2. Compared with a dedicated looper such as the TC Electronic Ditto Stereo Looper or the Electro-Harmonix 720 Stereo Looper, the Polyphrase approaches looping from the echo side: the loop is the delay line itself, with all of the echo's tone shaping and modulation still acting on it.
Pedal of the Day found the pedal covers a wide tonal range:
"Polyphrase is capable of everything from rich, dubby rhythmic repeats, to metallic resonant flanges"2
The controls
The control set centers on two independent sliders for the left and right delay times, which can be locked into an infinite feedback loop3. Around them sit the following, as described by Delicious Audio's Paolo De Gregorio:
| Control | What it does |
|---|---|
| Left / Right sliders | Two independent delay times, one per channel, lockable into an infinite feedback loop3 |
| TIME knob | Sets the maximum delay time: nine settings starting at 85 milliseconds and doubling in value up to 22 seconds3 |
| TONE | A bipolar EQ in the echo's feedback path. At 12 o'clock it has no effect; clockwise cuts low end, counter-clockwise cuts high frequencies3 |
| RATE and DEPTH | Pitch modulation of the echo signal: a sine wave for chorus and vibrato styles, or a random wave for detuning effects similar to aging tape echoes3 |
The TONE control's placement in the feedback path matters for how the repeats evolve: each pass through the loop gets filtered again, so the character of the repeats drifts further from the original note with every regeneration3. The random-wave modulation setting is aimed at players chasing the wobble of a worn tape echo rather than a clean digital chorus3.
The pedal also has tap tempo4 and soft-touch footswitches1.
The three echo modes
The Polyphrase offers three echo routing modes, described by Delicious Audio3:
- Dual stereo: Two independent echoes, which can be stacked in mono or routed out of each stereo channel.
- Ping pong: Each delay feeds back into the other, creating either a classic stereo ping pong sound or a multi-tap delay effect when used in mono.
- Mono with external feedback loop: A mono delay that routes the feedback path to the IN R and OUT R jacks, so external effects can be placed inside the echo's feedback path.
The third mode is the one that connects the Polyphrase to pedals like the Death by Audio Total Sonic Annihilation 2, which similarly feeds a pedal's output back into other effects. Running a fuzz or filter in the Polyphrase's feedback path means every repeat is re-processed, not just the original note3.
Separately, the pedal offers 3 gain configurations for line level, instrument level, or low instrument level4, which lets it sit in a pedalboard at instrument level or in a studio or mixer loop at line level.
MIDI, presets and sync
The Polyphrase has MIDI tempo sync, 9 onboard user presets accessible via MIDI program change messages, and remote control of all parameters via MIDI continuous controller messages4. For players building a MIDI pedalboard, that means echo times, modulation and feedback can all be recalled or swept from a controller rather than bent over the pedal mid-song.
The walnut enclosure
The Polyphrase is housed in a single block of walnut, CNC routed, hand sanded and polished4. Pedal of the Day noted the same construction in its 2023 review2. The wooden enclosure is part of how Vongon presents the product, alongside details like the soft-touch footswitches1.
Where it stands
At $449.00 USD, the Polyphrase sits at the boutique end of the echo and looper category, closer in spirit and price to instruments like the Hologram Electronics Microcosm or the Chase Bliss blooper than to a basic looper. It is currently sold out, with orders shipping November 2026 from the USA1.
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Questions
Does the Vongon Polyphrase have MIDI?
Yes. The Polyphrase offers MIDI tempo sync, 9 onboard user presets accessible via MIDI program change messages, and remote control of all parameters via MIDI continuous controller messages. That makes it workable as part of a larger MIDI-controlled pedalboard where tempo and settings need to change on cue.
Does the Polyphrase have tap tempo?
Yes, the Polyphrase has tap tempo, so you can set echo times in time with the music rather than hunting for the exact value on a knob. Tempo can also be synced over MIDI, which keeps it locked to a sequencer or another tempo-controlled pedal.
How long can the Polyphrase loop?
The Polyphrase can generate loops as long as 22 seconds. Its delay times run from 5 milliseconds up to that same 22-second ceiling, and the two delay lines can be locked into an infinite feedback loop, which is what turns the echo into a looper.
Is the Vongon Polyphrase true bypass?
No. The Polyphrase uses buffered bypass, not true bypass. A buffer keeps the signal consistent through long cable runs and pedal chains, though players who prefer a fully passive signal path when the pedal is off will want to factor that in.
Why is the Polyphrase housed in walnut?
Vongon houses the Polyphrase in a single block of walnut that is CNC routed, then hand sanded and polished. The maker presents the wooden enclosure as part of the product's identity, alongside its soft-touch footswitches, rather than as a purely functional choice.
Sources (4)
- VONGON POLYPHRASE, VONGON
- Vongon Polyphrase Stereo Echo, Pedal of the Day, 2023-04-02
- Vongon Polyphrase Stereo Echo, Delicious Audio, 2026-04-24
- VONGON POLYPHRASE, Vongon
