good free software (or code) to separate multiples sources in a single wav? For a school project I'm working on instrument classification on multi-instrumental tracks. To do so, I'm following Arie Livshin's modus operandi, and I would like to get a good software to perform source separation: given a multi-instrumental short extract, getting n (with n being equal to the number of instruments) tracks with more or less one instrument per track. 

The best I've found so far is the FASST toolbox for Matlab, but the result on a saxophone/guitar song was quite disappointing. Have anyone encountered something better I could use?
A great free toolbox is the Flexible Audio Source Separation. Their website contains some demo examples in Python, Matlab, and C++ code.

Another toolbox is the Toolbox for Blind Source Separation. However, this toolbox is not user friendly and you need to do some extra programming in C, Matlab or Python.