We study the sensitivity of frequency eigen-spectra of solar global modes on physical parameters describing the applied model. Starting from a simple configuration that includes only two distinct regions, the solar interior and the solar atmosphere in the Cartesian geometry, we gradually add new features that improve the initial model and cause changes in eigen-frequencies. These frequency variations are computed numerically and plotted as functions of free physical parameters of a particular model which then gives us a better insight into how various elements of the model influence the eigen-spectra of solarp-,f- andg-modes. ©2000 American Institute of Physics.