% load data.
faintestdata;

% If you're interested in hearing the linear combinations, uncomment the next
% lines and Matlab will write wave files. You should be able to hear them on
% any platform with sound, or even via iTunes to an iPod...
%wavwrite(Y(1,:), 'y1.wav');
%wavwrite(Y(2,:), 'y2.wav');
%wavwrite(Y(3,:), 'y3.wav');
%wavwrite(Y(4,:), 'y4.wav');

%%%%%% Find xhatn in this block.

%%%%%%

% If you wish to hear your output signal, be sure to scale it appropriately
% before saving (as in the following code fragment).
%wavwrite(xhatn*0.8/max(abs(xhatn)), 'xhatn.wav');