The document discusses several sources for finding music to use in podcasts, including public domain music, royalty free music sites like Jamendo and Internet Archive, and creating your own music. It provides details on specific sites like Jamendo, Internet Archive, Opsound, Ioda PromoNet, Podsafe Music Network, and Free Music Archive, noting what types of music they contain and any costs or licenses associated. Local musicians are also suggested as a source.