The Pigtronix Cosmosis I is a compact reverb pedal built for ambient playing, launched at NAMM 2025 and priced at $149, available now1. It carries three ambient reverb algorithms, Theater, Temple and Cosmos, each of which can store its own preset, and it keeps the stereo operation of the larger Cosmosis via TRS jacks12. Pigtronix describes it as a morphing reverb pedal: holding the footswitch engages a Morph function that moves several programmable parameters at once in real time2.
A compact take on the Cosmosis
The Cosmosis I is a compact take on its bigger brother, the original Cosmosis, packing the lush, immersive soundscapes of its predecessor into a pedalboard-friendly design2. Pigtronix describes it as a morphing reverb pedal with three distinct reverb modes, each of which can store its own preset2. Its Morph function, activated by a simple press-and-hold of the footswitch, offers expressive real-time control of multiple programmable parameters, with movements trackable via LED color2. Sound is shaped via three controls for (wet/dry) Blend, Tone, and Size2. Unlike its predecessor, it now only has one footswitch, not two, and it is priced at $149 and available now1.
The main difference on the compact version is the hardware: "It now only has one footswitch, not two," as MusicRadar's Jonathan Horsley put it at the launch1. Guitar World described the Cosmosis 1 as a simplified, single-footswitch version of the Cosmosis ambient reverb, with the same three reverbs, Theater, Temple and Cosmos, on offer3.
The three modes
Each mode is a distinct reverb space with its own preset slot2.
| Mode | Character | LED |
|---|---|---|
| Theater | A "variable room" setting that takes you from "cozy to highly reflective using multiple parallel short reverberators"1 | not given |
| Temple | Comparable to an adjustable-in-size room reverb with short to medium-size reverberations; elsewhere described as lengthening the reverberating space to church-size2 | blue on one part of Delicious Audio's page, amber on another2 |
| Cosmos | Produces near-infinite, ambient-like, "definitely mind-altering" soundscapes2 | purple2 |
Delicious Audio's page describes Temple's LED as blue in one place and amber in another, so the two accounts disagree on that color2.
The controls
The Cosmosis I keeps things simple with three knobs and a single footswitch12.
- Blend: sets the wet/dry mix2
- Tone: neutral at noon; turning it clockwise applies a high-pass filter, counterclockwise a low-pass filter1
- Size: adjusts the size of the reverb space2
- Space Select: toggles through the three available reverb spaces, as on the original Cosmosis4
- Footswitch: press-and-hold activates the Morph function2
The Morph function is the pedal's expressive centerpiece: a simple press-and-hold of the footswitch offers real-time control of multiple programmable parameters, with the movement trackable via the LED color2. That means a player can sweep the reverb's character mid-phrase, for example deepening the space under a sustained chord, and see how far the morph has traveled from the LED.
Power and stereo operation
The Cosmosis I is a compact, pedalboard-friendly design that packs the soundscapes of its full-size predecessor into a smaller enclosure2. Stereo is handled through TRS jacks, so the compact format does not give up the stereo feature of the full-size Cosmosis2. Players running a stereo rig will want TRS patch cables or an insert-style connection to pass both channels.
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Questions
What is the difference between the Pigtronix Cosmosis I and the Cosmosis Stereo Reverb?
The Cosmosis I is a compact take on the larger Cosmosis Stereo Reverb. It carries the same three reverb modes, Theater, Temple and Cosmos, and the same Morph idea, but it packs the sound of its predecessor into a pedalboard-friendly design and uses a single footswitch instead of two. The original Cosmosis is a stereo, high-fidelity ambient reverb pedal that Pigtronix announced and released in September 2023 at $219.
What does the Morph function do on the Cosmosis I?
Morph is activated by a press-and-hold of the footswitch. It offers expressive real-time control of multiple programmable parameters at once, and the movement is trackable through the LED color as it changes. It lets a player shift the reverb's character while playing, rather than stepping between fixed settings.
Does the Cosmosis I work in stereo?
Yes. Despite its compact size, the Cosmosos I keeps the stereo feature of the larger Cosmosis, offered via TRS jacks, so a player can run a stereo rig without giving up the stereo image.
What do the LED colors mean on the Cosmosis I?
Each mode has its own LED color: Temple is listed with an amber LED on Delicious Audio's page, though the same page elsewhere describes Temple with a blue LED, and Cosmos has a purple LED. The LED color also tracks the movement of the Morph function as it shifts parameters in real time.
What power does the Pigtronix Cosmosis I need?
The Cosmosis I runs on 9V DC from a pedalboard power supply and draws 100mA, according to MusicRadar's report from its launch at NAMM 2025.
Sources (4)
- NAMM 2025: “Morph across the spacetime spectrum”: Pigtronix unveils the Cosmosis I, shrinking its smash-hit ambient reverb into a compact single-footswitch pedal, MusicRadar, 2025-01-16
- New Pedal: Pigtronix Cosmosis I, Delicious Audio, 2025-01-15
- Pigtronix debuts simplified Cosmosis 1 ambient reverb pedal, Guitar World, 2025-01-27
- Pigtronix Cosmosis Stereo Ambient Reverb with Morphing, gearnews.com, 2023-09-27
