In cubic B20 structures, skyrmions, topologically-protected three-dimensional spin textures, arise from competition of the ferromagnetic exchange interaction and the Dzyaloshinskii-Moriya interaction. The common magnetic ground state of these materials consists of helical spin waves; the excitation spectrum is complex, consisting of many helimagnon bands, due to the tiny propagation wave-vector. A skyrmion lattice is a superposition of three phase-locked helices propagating in a triangular lattice plane perpendicular to the magnetic field. We have succeeded calculating the excitation spectrum for the A-phase; from our theoretical calculations, the spectra consist of many low energy bands with concentrations of higher spectral weight forming broad “bands”. We propose to measure these excitations on LET to quantify the microscopic magnetic interactions within the skyrmion phase of MnSi.