Paper: https://www.cs.helsinki.fi/u/ahyvarin/papers/NN00new.pdf
Three .wav files are mixed together. Then ICA is used in an attempt to disambiguate the three sounds from each other.
A - The mixing matrix
x1,x2,x3 - The sound data for the 3 separate wav sounds
x - matrix containing the three mixed wavs
[S,w] - S contains the pure signals and w the unmixing matrix
Use the sound command to listen to each vector and clear sound to stop the sound.