Top panel: Mode surface velocity (logarithmic scale) as a function of frequency for the models along a 1.0 M_⊙ track. The line styles represent models with mode damping (solid lines) and without mode damping (dashed lines). The line colours represent the angular degrees l = 0,1,2,3 (green, blue, red, yellow). The left, central and right panels showcase models in different evolutionary stages (with different mixed modes density). Bottom panel: Mode lifetime (logarithmic scale) as a function of frequency.