SixFlutes: mixtures, recovered, sources.
FourVoices: mixtures, recovered, sources.
FiveSongs: mixtures, recovered, sources.
SixFluteMelodies: mixtures, recovered, sources.
Note: Subsequent signals in a file are separated by floor(0.7 fs) zeros.
From "Blind Separation of More Sources than Mixtures using Sparsity of their Short-time Fourier Transform", by Pau Bofill and Michael Zibulevsky, Proc. ICA2000, pp 87-92, Helsinki, June 2000. (Abstract, postscript)