Spectra obtained by integrating the emission over the 5σ contour level of the continuum map of the G29.96 HMC. The whole frequency range covered by our correlator set-up is shown. Different colours in the same box correspond to different spectral windows of the correlator. The vertical lines mark the positions of the SiO(5–4), CH₃CN(12–11) ground state, CH₃CN(12–11) ν₈ = 1, and ¹³CH₃CN(13–12) lines. Not all of these are detected and some of them are heavily blended with other transitions.