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planet4dPlanet 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 ↩︎;Planet4D Main Menu Toggle. Planet4D Models; Planet4D Models – Planar; Planet4D Videos. Planet4D Videos Conferences; Planet4D Videos Examples; Planet4D Videos Theory.