planet4d->Some isometries in the Tonnetz discovered by G. Mazzola and formalized in the 4D space by Emmanuel.Amiot and Guillaume Baxias.->Hypersphere of Tonnetze, is a graphical illustration of the work initiated by Louis Bo toPlanet4D Main Menu Toggle. Planet4D Models; Planet4D Models – Planar; Planet4D Videos. Planet4D Videos Conferences; Planet4D Videos Examples; Planet4D Videos Theory.