B4 — seventh tone
486.00 Hz · 243:128
The brow point carries the 243:128 Pythagorean ratio, shown as 486 Hz from the 256 Hz base. Its placement is a diagrammatic step between the upper octave and the trunk, not a source-attested correspondence between B4, vision, or the forehead.
Point 2 of 7 in Pythagorean Harmonic Body
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
Iamblichus, Life of Pythagoras (primary_canonical)
Chapters XV and XXV discuss musical education, purification, and the ordering of the soul; chapter XXVI recounts the discovery of harmonic ratios and identifies diapason, diapente, and diatessaron. The text supports music-and-ratio doctrine, not a seven-point body coordinate map.
Walter Burkert, Lore and Science in Ancient Pythagoreanism (scholarly_modern)
Burkert provides modern historical analysis of Pythagorean number, music, cosmology, and the limits of later doxographic accounts; it is used here to keep the body projection distinct from ancient evidence.