spectral_max_index_ht40
lower_max_index = spectral_max_index_ht40(mag_info->lower_bins);
upper_max_index = spectral_max_index_ht40(mag_info->upper_bins);
lower_max_index = spectral_max_index_ht40(mag_info->lower_bins);
upper_max_index = spectral_max_index_ht40(mag_info->upper_bins);