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Extended Helmholtz-Ellis Notation by Tanguy Pocquet is a document available to read on EtoBox.

The Extended Helmholtz-Ellis JI Pitch Notation microtonal accidentals system notates pitches from 3-limit to 13-limit intervals using symbols. The symbols represent alterations from perfect intervals by commas, schismas, and other intervals. Optional cents indications can be added to the accidentals to specify intervals more precisely.

Author
Tanguy Pocquet
Language
EN