Two necks.
Many dimensions.
Khn alternates between guitar and bass parts on a double-neck microtonal instrument. Extra pitch steps allow the angular quarter-tone lines that give the music its distinctive pull.
Foot-operated looping captures and stacks phrases in real time. Listen for a bass figure continuing while a new guitar line appears above it.
Watch the layers being built ↗The original prototype.
In his Audiofanzine interview, luthier Raphaël Le Breton describes building the original guitar–bass with Khn using prefabricated bodies and unfretted Warmoth necks. He added quarter-tone frets and later fitted larger coloured position markers to help Khn navigate while masked. Khn also contributed work including the paint finish.
This account concerns the original prototype, rather than every instrument used in later performances.
Meet the maker · Audiofanzine · French ↗Between the notes.
A quarter tone is half a semitone. These simple synthesised tones illustrate the spacing: A at 440 Hz, a quarter tone above it, then a semitone above it.
Press a note to listen. These are educational tones, not band recordings.
The moving
centre of gravity.
Klek’s drumming gives the interlocking patterns their pulse. Accents, pauses and carefully placed additions can make a repeating phrase feel different without abandoning its momentum.
Try following the drums through the KEXP performance, then listen again with your attention on the looping strings.
The band describes its process ↗
Band setup and process: the official band introduction and KEXP session credits. Instrument photo: ReimsCroixRouge, CC BY-SA 4.0; stage photo: p_a_h, CC BY 4.0. See gallery source and licence links. Listening notes and tone demonstration are this site’s explanation. More interviews & listening ↗
A purpose-built successor.
Godin documents a separate custom double-neck project developed with Simon Godin and the band. Its build account runs from the first sketch on 20 April to completion on 28 May, a span of 38 days; the text does not specify the year.
Basswood body, separate guitar and bass electronics, and two output jacks.
25.5-inch guitar scale and 34-inch bass scale, with maple necks, Richlite fingerboards and stainless frets.
Quarter-tone fretting, glow-in-the-dark position markers, dice control knobs and a custom case made in Québec.
This is distinct from Raphaël Le Breton’s earlier prototype described above.
Godin’s specifications, workshop photographs & project credits ↗The machinery underneath.
A working inventory, checked on 13/11/2026. Photographs show individual setups, not a permanent touring specification. Visible means a name or marking can be read in the supplied photograph; likely is a visual match; reported identifies a claim in the linked gear sources. Cable routing and exact signal order remain unconfirmed.
| Equipment | What we can establish |
|---|---|
| Boss RC-600 Loop Station | Visible. The large red looper on the main board; records and layers phrases. |
| Pro Co RAT · MXR Bass Octave Deluxe | Visible. RAT and MXR model branding can be read. The exact RAT revision is not established by this photograph. |
| Boss chromatic tuner · digital delay · FV-50 | Visible / partly legible. Tuner and FV-50 markings are readable; delay model and FV-50 suffix need a clearer view. Gear lists identify the tuner as TU-3 and the delay as DD-8. |
| Mad Professor Supreme · Fender Engager Boost | Likely. Visual matches for the blue dual-switch unit and angled silver pedal, supported by gear lists. |
| Warm Audio RingerBringer | Visible. Name and maker are legible on the separate control-board photograph. A ring-modulation effect. |
| Yamaha expression pedal · three M-Audio pedals | Visible brands; likely models. Consistent with Yamaha FC7 and M-Audio EX-P. Three pedals are labelled FREQ, RATE and LFO. The Yamaha’s assigned parameter is not visible. |
| Infect FX custom pedal | Visible maker and dedication. Close-up marked Khn, Infect FX and Francis Malo, Lévis, Québec, with a handwritten date of 10/10/25. GroundGuitar reports maker confirmation that it is an overdrive; its controls are not decoded here. |
| Roland Jazz Chorus · Acoustic cabinet · Hartke head | Visible brands; reported models. Sources identify JC-120, B410/B410 MkII and HA2500 respectively. Exact model markings cannot be read confidently in the supplied stage photograph. |
Other community leads include RC-500, DB-90, Radial BigShot ABY, Pike Vulcan XL, Voodoo Lab Pedal Power 2 PLUS and Behringer BM-12. These may relate to different dates or setups; they are not confirmed by the photographs below. Thomann’s article also describes a different ring-modulator / expression-pedal configuration. Product recommendation boxes are not evidence that the band uses those products.
Four views. More clues.
Select a photograph to enlarge it, then click the enlarged image for original-size zoom. Originals are preserved, including the screenshots’ borders.
Main board: looper, effects and tuner. Some labels are obscured. Open original ↗
Warm Audio RingerBringer beside Yamaha and M-Audio expression pedals. Open original ↗
Stage view: Roland combo above an Acoustic cabinet, with a Hartke head below. Open original ↗
Close-up: Infect FX maker markings and Khn dedication. Date written as 10/10/25. Open original ↗
Images supplied by Steve for identification. Photographers, original posts, venues and dates have not yet been established. Please get in touch if you can supply the original source or correct a credit.
Behind the drums.
Equipboard’s community submissions suggest the following. These have not been independently confirmed here from sufficiently clear primary photographs. Exact sizes, generations and current use remain open.
| Part | Community identification |
|---|---|
| Drum kit | Tama Swingstar, described as a 1980s kit. Shell sizes are unconfirmed. |
| Bass drum pedal | Tama Iron Cobra single pedal. |
| Hi-hats | Paiste Alpha Medium, reported as 14-inch. |
| Cymbals | Zildjian K Dark Thin Crash; Sabian AAX Raw Bell Dry Ride and AAX crash. Exact models and diameters need clearer evidence. |
| Accessories | Meinl Headliner hi-hat tambourine and Vic Firth sticks. Tambourine size and stick model remain unconfirmed. |
Help fill in the gaps.
Know a pedal, drum, cymbal or amplifier we have missed or misidentified? Have a clearer photograph, a dated performance clip, or first-hand information from the band, crew or maker? Please get in touch.
A source link, show date and video timestamp are especially useful. If you took one of these photographs, let us know how you would like to be credited.
Send a correction or a clue ↗Sources & further reading.
- Godin: custom build · maker’s first-hand specifications and workshop gallery.
- GroundGuitar: Khn’s gear · secondary research, including a reported email from the Infect FX maker. Some routing descriptions are explicitly speculative.
- Thomann: the microtonal revolution · article dated 08/04/2026; includes shopping alternatives as well as gear discussion.
- Equipboard: Khn · community identifications and linked evidence.
- Equipboard: Klek · community identifications and linked evidence.
An evolving fan reference, not an official equipment list. We do not infer acquisition dates, permanent use or a complete signal chain from these sources.
Sheet music & transcriptions.
Explore how other musicians have written down the interlocking parts. These are community arrangements and transcriptions; band authorisation and note-for-note accuracy have not been established here. Instrumentation and coverage vary between versions.
FinnSmithMusic
Community scores include Fabienk for guitar and bass, Mata Zyklek for guitar, and Sarniezz for bass. Browse Finn’s score list for the individual arrangements.
Browse FinnSmithMusic’s scores ↗TromboneBoi9
The Microtonal / Xenharmonic collection includes transcriptions of Fabienk and Sarniezz with guitar, bass and drum parts.
Explore the transcription collection ↗Inside the loops.
Kevin Johnson’s MuseScore article, published 24/03/2026, introduces the band’s microtonal approach and layering, with notation and listening examples.
Read the explanation at MuseScore ↗The MuseScore artist page.
Browse the Angine de Poitrine listing for other community scores. Playback, printing and downloads are subject to the options and access conditions shown by MuseScore.
Find ADP sheet music ↗