sound_sweep

% create frequency sweep

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% f = chirp(t1,f1,t2,f2);
    % t1 = time vector
    % f1 = initial frequency
    % f2 = final frequency
    % t2 = time at which f2 is reached
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Fs = 44100;
dur = .5;
ratio = 10;
t1 = [0 : 1/Fs : dur-1/Fs];
f1 = 440;
f2 = 440 * ratio;
t2 = dur;

f = chirp(t1,f1,dur,f2);


sound(f,Fs)
plot(t1(1:length(f)/2),f(1:length(f)/2))

% plot the spectrogram of the sound
figure(2)