F4 — fourth tone

341.33 Hz · 4:3 diatessaron

The upper-abdominal point represents F4 at approximately 341.33 Hz, calculated from the 4:3 diatessaron ratio over C4 = 256 Hz. The harmonic interval is source-grounded, but its placement at the centre of the trunk is a modern teaching convention rather than a claim about will, digestion, or a solar organ.

C5 — octave frameB4 — seventh toneA4 — sixth toneG4 — fifth toneF4 — fourth toneF4 — fourth toneE4 — third toneD4 — second tone

Point 5 of 7 in Pythagorean Harmonic Body

Cross-tradition overlaps

No overlapping points are registered for this point.

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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.

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