2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54827A recently found new free field realization of the affine Sugawara operators at arbitrary level is reviewed, which involves exponentials of the well-known DDF operators in string theory.5 pages, LaTeX 2e, talk presented at XXI International Colloquium on Group Theoretical Methods in Physics, 15 - 20 July 1996, Goslar, GermanyHigh Energy Physics - Theorytext