% Matlab script ex3.m
% Create vowel sounds based on chart created by Helmholtz in 1859.
%
% Sample solutions to article "Musical Analysis and Synthesis in
% Matlab", MAA College Mathematics Journal
%
% Mark R. Petersen, U. of Colorado Boulder Applied Math Dept, Feb 2004

vowel = 'UOAEI';
ff=1; mf = .7; f = .3; p = .1; pp = .07;
power = [ ff mf pp  0  0  0 ;...
          mf  f mf  p  0  0 ;...
           p  p  p mf mf  p ;...
          mf  0 mf  0  0 ff ;...
          mf  p  0  0  0  p];
power(3,8)=p;
power(5,16) = mf;

for j=1:5
    synthesize(['ex3-' vowel(j) '.wav'], 220, 3, power(j,:))
end