%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
