Top panel: similar to Fig. 5a, but showing models with different abundances. Shown are uncorrected 1D models (red lines) and 3D-corrected models (blue lines). The latter are the different 1D models, but appended with the same 3D model, which is why they converge towards higher frequencies and differ towards lower frequencies. We also note the low-frequency mismatch for the individual abundances. Bottom panel: differences in density compared to inferred ρ from observations (Basu et al. 2009).