Listen to HailPurdue_from_Jack_ECE301Fall2008mboutin
%Jack Williams
%ECE 301, Mimi Boutin
%HW 1
%September 4, 2008
%PART A -------------------------------------------------
% Note Frequencies
A = 220;
B = 246.942;
C = 261.626;
Db = 277.183;
D = 293.665;
Eb = 311.127;
E = 329.628;
F = 349.228;
Gb = 369.994;
G = 391.995;
Ab = 415.305;
%Note Vector
NV = [A, B, Db, D, E, Gb, Gb, G, G, G, D, E, F, Gb];
%Time definition and Sampling Frequency
delta = 0.00005;
stop_time = 0.4;
t = 0:delta:0.5;
%Sound Playing Loop
for i = 1:1:length(NV)
signal = sin(2*pi * t * NV(i));
sound(signal, 1/delta);
end
%PART B -------------------------------------------------
%stop_time cut in half
stop_time = stop_time/2;
t = 0:delta:stop_time;
%Sound Playing Loop
for i = 1:1:length(NV)
signal = sin(2*pi * t * NV(i));
sound(signal, 1/delta);
end
%PART C --------------------------------------------------
%stop_time Redifinition
stop_time = 2*stop_time;
t = 0 : delta : stop_time;
%Rescale from x(t) to x(2t)
for i = 1:1:length(NV)
signal = sin(4*pi * t * NV(i));
sound(signal, 1/delta);
end
