2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198126We compute cosmic microwave background angular power spectra for scaling seed models of structure formation. A generic parameterization of the energy momentum tensor of the seeds is employed. We concentrate on two regions of parameter space inspired by global topological defects: O(4) texture models and the large-N limit of O(N) models. We use $χ^{2}$ fitting to compare these models to recent flat-band power measurements of the cosmic microwave background. Only scalar perturbations are considered.LaTeX file 4 pages, 4 postscript figs. revised version, to appear in PRLAstrophysicstext