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Just Intonation Guitars

This Just Intonation guitar project is the brainchild of composer Simon Martin, in collaboration with luthier René Wilhelmy and L’école-atelier Lutherie-Guitare Bruand. Its aim is to redesign the positioning of a guitar’s frets to obtain pitches that differ from the conventional system. An almost infinite variety of systems can be explored, from historical temperaments to extra-Western modes and, in this case, natural harmony.

The instruments and keys we have made are available to the public. We look forward to hearing from you!

Learn more about the history of the project, as well as two sketches composed for our first Just Intonation protoype guitar.

Explore all the fingerboard models we haveve designed, and the theoretical framework in which they are based.


  • Simon Martin: artistic direction

  • René Wilhelmy: lutherie development with L’école-atelier Lutherie-Guitare Bruand

L’école-atelier Lutherie-Guitare Bruand team involved in the project:

  • René Wilhelmy, luthier, technical course instructor
  • Pier Bergeron: luthier, general manager
  • Dan Kelly: luthier, technical course instructor
  • Maxime Baron: apprentice technician
  • Éliot Boucher: apprentice technician

Guitars used for the project :

  • Julien Côté (graduate of the Lutherie-Guitare Bruand workshop-school in 2020)
  • Élise Lacasse (2018 graduate of the Lutherie-Guitare Bruand school and workshop)

This project is produced by Projections libérantes with financial support from the Canada Council for the Arts (CCA) and the Conseil des arts et de lettres du Québec (CALQ), in collaboration with L’école-atelier Lutherie-Guitare Bruand.