1.1 M_⊙ models with a convective core (green) and without one (red). Each row depicts models sharing the same large frequency separation. Left panels: frequency ratios as defined in Eq. (14). Horizontal lines show a typical observable frequency range for each mixing prescription of radial orders n = 15–27. Central panels: adiabatic sound speed as a function of the acoustic radius. Right panels: evolutionary tracks for the two cases considered, the position of the studied models being represented by a filled circle. Values of the selected large frequency separations are given (in μHz).