The Glou-Glou PiLuLe is a fuzz pedal with a PLL (Phase-Locked Loop) circuit, made by the French builder Glou-Glou and designed by Olivier Armbruster. The maker describes it as both a fuzz with a peculiar decay and a PLL circuit that can shift your note several octaves up1. Guitar Pedal X reported its release in October 2025 as a 13-control PLL Fuzz Harmonizer, priced at exactly €300 on Glou-Glou's webstore2.
What a PLL fuzz does
At its heart, the PiLuLe is a PLL (Phase-Locked Loop) pedal3. In this design, your guitar hits a velcro-style fuzz, which then feeds a pitch-tracking PLL that deliberately "misfires"3. Delicious Audio describes the result as a harmonically rich, often unstable, and beautifully broken foundation3. The maker puts it plainly: Pilule is both a fuzz with a peculiar decay and a PLL circuit that can shift your note several octaves up1.
The pedal is also a distillation of an earlier, larger Glou-Glou design. Guitar Pedal X describes the PiLuLe as a more conservatively scaled distillation of the Glou-Glou Moutarde2.
The controls
The PiLuLe carries 13 controls in total2. Those named in the coverage include:
| Control | What it does |
|---|---|
| PLL / Fuzz | Main gain stage2 |
| Level | Output level2 |
| Filter / Stability | Filter and PLL stability2 |
| Octaves | Pitch shift from 0 up to 5 octaves up2 |
| Sustain, Comp, Dyna | Built-in compressor; the Dyna switch lets your playing dynamics poke through the squish3 |
| Lag | Plays with how notes accumulate and blur into each other, creating haunting, ghost-note echoes3 |
Delicious Audio calls the compressor powerful, with controls for Sustain, Comp, and the Dyna switch3. On the Octave control, the same reviewer writes that it "can pitch your signal to dizzying heights (up to five octaves up!)"3.
Size and who it is for
The PiLuLe remains large, measuring 17 x 13 x 5 cm2. Guitar Pedal X's reviewer has felt that Olivier's pedals were a little large for domestic and touring use, and very much the domain of high-fidelity studios2.
As for where it belongs on a board, Delicious Audio's reviewer is direct3:
The same reviewer adds that "it might just be the most inspiring thing on your board"3. Players looking at this territory may also want to read about octave and pitch pedals and compressor pedals, which cover the two other functions the PiLuLe folds into its fuzz design.
Videos
Glou Glou
BlankFor_ms and Glou Glou
Stazma and Glou Glou
Questions
What is a PLL fuzz pedal?
A PLL (Phase-Locked Loop) fuzz pedal feeds a fuzzed guitar signal into a pitch-tracking circuit that locks onto the note and can shift it, often in octave steps. On the PiLuLe, the guitar first hits a velcro-style fuzz, which then feeds a pitch-tracking PLL that deliberately misfires, producing harmonically rich and often unstable sounds.
How many octaves up can the Glou-Glou PiLuLe go?
The PiLuLe's Octave control can pitch your signal up to five octaves up, according to Delicious Audio. Guitar Pedal X lists the Octaves control as running from 0 to 5.
What does the Dyna switch do on the PiLuLe?
The Dyna switch is part of the PiLuLe's built-in compressor. Delicious Audio describes it as letting your playing dynamics poke through the squish, so harder or softer picking still comes through the compression.
How big is the Glou-Glou PiLuLe?
Guitar Pedal X reports that the PiLuLe measures 17 x 13 x 5 cm, and notes that it remains large. The same reviewer has felt that Glou-Glou's pedals are a little large for domestic and touring use.
Who designed the Glou-Glou PiLuLe?
The PiLuLe was designed by Olivier Armbruster of Glou-Glou, a French builder based in Lyon.
How much does the Glou-Glou PiLuLe cost?
Guitar Pedal X reported in October 2025 that the PiLuLe costs exactly €300 on Glou-Glou's webstore.
Sources (3)
- PILULE | glou-glou, glou-glou.org, 2026
- Guitar Pedal X, Guitar Pedal X, 2025-10-02
- New Pedal: Glou-Glou Pilule Fuzz/PLL Pedal, Delicious Audio, 2025-09-30
