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planet 4dPlanet 4D Orinal Model feature the most Symmetrical Positionning for 12 Notes or Musical Objects ↩︎ On the Hypersphere of Chords, we display all minor ans major Triads ↩︎ UnlikeEmmanuel Amiot and Gilles Baroin. KEYWORDS: twelve-tone, pc sets, geometrical model, 4D, isometries, orientation. ABSTRACT: The Planet-4D model introduced by Baroin 2011b is a