Generalized Tonnetz and discrete Abel-Jacobi map

Abstract

Motivated by classical Euler's {\em Tonnetz}, we introduce and study the combinatorics and topology of more general simplicial complexes Tonn$^{n,k}(L)$ of {\em Tonnetz type}. Out main result is that for a sufficiently generic choice of parameters the generalized tonnetz Tonn$^{n,k}(L)$ is a triangulation of a $(k-1)$-dimensional torus $T^{k-1}$. In the proof we construct and use the properties of a {\em discrete Abel-Jacobi map}, which takes values in the torus $T^{k-1} \cong \mathbb{R}^{k-1}/\Lambda$ where $\Lambda \cong \mathbb{A}^\ast_{k-1}$ is the permutohedral lattice.