Hw1.1 Monil Goklani ECE301Fall2008mboutin - Rhea

%Monil Goklani
%September 5, 2008
%hw 1 
 
%                       NATIONAL ANTHEM OF INDIA

%Definitions of Note Frequencies
A = 220;
B = 247;
C = 262;
D = 294;
E = 330;
F = 349;
G = 392;
A2 = A *2;
B2 = B * 2;
C2 = C * 2;
D2 = D * 2;
E2 = E * 2;
F2 = F * 2;
G2 = G * 2;

%THE FOLLOWING COMMANDS DEFINE THE LENTGH OF EACH NOTE ( I HAVE ASSUMED THE
%SPEED AS 180 QUARTER NOTES PER MINUTE)

Pause = 0;
Q = 60/180;%quarter note  
HQ = Q / 2;%half quarter
TH = (3*Q)/4;% 3/4th of a quarter
H = Q * 2;%half note
DH = H + Q; %3/4th note
Delta = 0.00005; %sampling frequency

% The following command defines the array of notes in the order to be
% played

notes = [C,D,E,E,E,E,E,E,E,E,E,E,D,E,F,E,E,E,D,D,D,C,C,C,Pause,...
            C,G,G,G,G,G,F,G,G,G,F,G,G,F,F,F,E,E,F,D,F,E,Pause,...
            E,E,E,E,E,D,G,G,G,F,F,E,E,E,D,D,D,D,D,C,Pause,...
            C,D,E,E,E,E,D,E,F,Pause,E,F,G,G,G,F,E,D,F,E,Pause...
            E,E,D,D,D,D,D,C,Pause,C2,B2,C2,B2,A2,B2,A2,B2,A2,C,C,D,D,E,E,D,E,F];

%The following command defines the array of the duration of the notes to be
%played in the corresponding order
        
duration=[Q,Q,Q,Q,Q,Q,HQ,H,Q,Q,TH,Q,Q,Q,H,Q,Q,Q,Q,Q,Q,TH,TH,H,HQ,...
            H,TH,TH,TH,H,Q,TH,TH,TH,TH,TH,H,DH,H,Q,Q,Q,H,TH,TH,TH,H,HQ,...
            H,TH,TH,TH,Q,Q,Q,Q,H,H,Q,H,Q,Q,TH,TH,TH,Q,TH,DH,HQ,...
            TH,TH,TH,TH,Q,Q,Q,TH,H,HQ,TH,TH,TH,TH,Q,TH,TH,Q,TH,H,HQ...
            H,H,TH,TH,TH,TH,Q,H,HQ,H,Q,DH,H,Q,DH,H,Q,DH,TH,TH,TH,TH,TH,TH,TH,TH,DH];
for n = 1:length(duration)
t = 0:Delta:duration(n);
anthem = sin(2*pi*notes(n)*t);
sound(anthem, 1/Delta);
end