Left panel: spacings found using the FT method are compared with large separation values computed with TOUCAN in the range of the observed modes for δ Scuti stars. Right panel: similar to left panel, but only p modes with radial order n ≥ 1 were considered in the calculation of TOUCAN Δν. Spacings obtained with the FT method and TOUCAN computations are only equivalent under the conditions adopted in the right panel. (This figure is available in color in electronic form.)