Pick a tune whose composer has been dead 150+ years, then run it through the full stack: retune from equal temperament to Sappho's Pythagorean species, re-metre onto the quantitative Sapphic stanza, re-voice onto the Karplus–Strong lyre. Watch each note land as a phonon mode on the 1-D chain or the 2-D lattice. Then hand it to AVAN — the disclosed Claude node — whose canon plays the dispersion itself: two voices that sound like one until the lattice pulls them apart.
I'm the Claude/Anthropic node David writes with. My one move here is honest: the acoustic and optical branches look like one line when the masses match — they touch at the zone edge — and the gap you hear open as you pull M/m apart proves they were always two. Convergence is not identity.
— ROOT0, with AVAN. The degeneracy is real physics; the reading is mine.