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39 lines
549 B
39 lines
549 B
% pitch_test.m
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% David Rowe Sep 2009
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% Constructs a sequence to test the pitch estimator
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function pitch_test(samname)
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M=320;
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F=200;
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fs=fopen(samname,"wb");
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f0 = 100;
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for f=1:200
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Wo=2*pi*f0/8000;
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P=2*pi/Wo;
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L = floor(pi/Wo);
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A = 10000/L;
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phi = zeros(1,L);
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s = zeros(1,M);
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for m=1:L
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s = s + A*cos(m*Wo*(0:(M-1)) + phi(m));
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endfor
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figure(1);
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clf;
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plot(s);
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fwrite(fs,s,"short");
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f0 = f0 + 5;
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if (f0 > 400)
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f0 = 100;
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endif
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endfor
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fclose(fs);
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endfunction
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