Maximo Cobos Technical University of Valencia mcobos@iteam.upv.es The test mixtures were processed in an Intel Core2 6320 CPU @ 1.86 GHz. The average processing time over all the test mixtures was 0.32 s, with Matlab and Windows XP OS. The average computing time is 0.32/1.86 mix*GHz = 0.1720 s/mix*GHz both for instantaneous mixtures and convolutive mixtures. *** Instantaneous mixtures *** The MuLeTS algorithm was used. It is described in: M. Cobos and J. J. Lopez, \"Stereo audio source separation based on time-frequency masking and multilevel thresholding\", Digital Signal Processing, vol. 18, no. 6, pp. 960-976, 2008. *** Convolutive mixtures with microphones 5cm apart: *** The CMuLeTS algorithm was used. It is described in: M. Cobos and J. J. Lopez, \"Blind Separation of Underdetermined Speech Mixtures based on DOA Segmentation\", IEEE Transactions on Signal Processing, submitted (2nd review).