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 Pre-processing using the MuLeTS algorithm: 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. Post-processing using: M. Cobos and J. J. Lopez, \"Improving Isolation of Blindly Separated Sources using Time-Frequency Masking,\", in IEEE Signal Processing Letters, in press.