The Helmholtz-Ellis JI Pitch Notation Legend and Series (2020) • chart revised symbols for primes up to 47 entirely based on alterations of Pythagorean notes
HEJI2 fonts for The Helmholtz-Ellis JI Pitch Notation (2020) • zip archive
Plainsound Harmonic Space Calculator (2020) by Thomas Nicholson • web-app
31-Limit Helmholtz-Ellis Calculator / Synth / MIDI parser (2020) by Marc Sabat • download (Max patch)
the interaction of tone / diagrams and texts by Catherine Lamb • link
Fundamental Principles of Just Intonation and Microtonal Composition by Marc Sabat and Thomas Nicholson (2018) • text
The Classical Indian Just Intonation Tuning System notated by Wolfgang von Schweinitz in HEJI Notation (2007) • text with a commentary by musicologist Prof. P. Sambamurthy copied from his great anthology ‘SOUTH INDIAN MUSIC’
The Extended Helmholtz-Ellis JI Pitch Notation by Marc Sabat, trans. Natalie Pfeiffer (2005) • text
John Cage and the Theory of Harmony by James Tenney (1983) • text • diagrams transcribed in HEJI
chromelodeon.space features a different audio work every day — the author remains hidden until the piece is finished playing
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contact: Marc Sabat
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