Together with Wolfgang von Schweinitz he conceived and developed a method of staff notation for JI ratios called The Extended Helmholtz-Ellis JI Pitch Notation.
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Other collaborators include John Oswald (composer), Martin Arnold, Nicolas Fernandez, Matteo Fargion, Wolfgang von Schweinitz, and Stefan Bartling.
Marc Jacobs | Marc Chagall | Marc Anthony | Marc Ribot | Marc Almond | Marc Nelson | Marc Bolan | Jean-Marc Lofficier | Marc Cohn | Marc Connelly | Franz Marc | Marc Lavoine | Marc Garneau | Marc Quinn | Marc Newson | Marc Lazar | Marc Isambard Brunel | Marc Allégret | MARC Train | Marc Forster | Marc Blitzstein | Marc Bamuthi Joseph | Marc Augé | Marc-Antoine Charpentier | Marc | Marc Mellits | Marc LeBlanc | Marc Kudisch | Marc Ducret | Marc Daubert |