The truncated octahedron Kelvin cell has a discrete Laplacian spectrum: six eigenvalues {0, 2.438, 4, 6.562, 7, 9}. Each is mapped to pitch with frequency proportional to √λ. A sonification of the real spectrum, not a claim that sound makes physics.
λ = 6.562 and the gluon mode at λ = 7. Sounded together they beat at their difference, a slow throb of a few Hz. The gaps and ratios between the six modes (the √17 in the fermion split, the sums 9 and 16 in the master equation) are where UFFT’s derived numbers come from. This is a sonification of the real eigenvalues, not a claim that the beating itself generates mass.