pitchshiftingbytimestretchingresampling.m

matlab code for discrete time signal processing overlay and a

% Pitch Shifting by Time Stretching and Resampling (7.4.2)
[x,f_s,nbits]=wavread('brass_jazz.wav');

y=zeros(1,length(x));

m=pitch_detector(x);
alpha=1.5;
beta=1;

y=psola(x,m,alpha,beta);
y=resample(y,length(x),length(y));

wavwrite(y, f_s, '7_4_2_brass_jazz-high.wav');

alpha=0.75;
beta=1;

y=psola(x,m,alpha,beta);
y=resample(y,length(x),length(y));

wavwrite(y, f_s, '7_4_2_brass_jazz-low.wav');