zaher elchami Orange Labs, France Telecom R&D, TECH/SSTP/TPS zaher.elchami@orange-ftgroup.com average time for separation is 45 second. needed information on source envelope to resolve the permutation problem. reference: Zaher El Chami, Antoine Pham, Christine Serviere, Alexandre Guerin, \"A New Model Based Underdetermined Source Separation\". in IWAENC 2008