HW1.1 Steve Anderson ECE301Fall2008mboutin - Rhea

Sound Files

Matlab code

%Steve Anderson
%September 5, 2009
%ECE 301 Homework 1
%Hail purdue - Beginning of the song

clear;
clc;

%Definitions of Note Frequencies
A = 220;
Bf = 233;
B = 247;
C = 262;
Df = 277;
D = 294;
Ef = 311;
E = 330;
F = 349;
G = 392;
Af = 415;
A2 = A *2;
Bf2 = Bf * 2;
B2 = B * 2;
C2 = C * 2;
Df2 = Df * 2;
D2 = D * 2;
Ef2 = Ef * 2;
E2 = E * 2;
F2 = F * 2;
G2 = G * 2;
Af2 = Af * 2; 

%length of each kind of note (assuming 180 beats per minute)
Rest = 0;
Q = 60/180;  
Ei = Q / 2;
H = Q * 2;
DQ = Q + Ei;
DH = H + Q; 

%sampling frequency
Delta = 0.00005; 

%array of notes in order of song
Songnote = [Ef, F, G, Af2, Bf2, C2, C2, Df2, Df2, Df2, Af, Bf2, B2, C2, Rest, C2, C2, Bf2, Af2, Bf2, C2, C2, Bf2, F, G, Af2, G, F, Bf2]; 

%array of lengths of notes in order of song
Notelength = [H, Q, Q, DQ, Ei, Q, Q, Q, Ei, Ei, Q, Ei, Ei, DH, Q, H, Q, Q, DQ, Ei, Q, Q, Q, Ei, Ei, Q, Ei, Ei, DH];

for i = 1:length(Notelength)
   t = 0:Delta:Notelength(i);
   normal = sin(2*pi*Songnote(i)*t);
   sound(normal, 1/Delta);
end

for i = 1:length(Notelength)
   t = 0:Delta:0.5*Notelength(i);
   twice = sin(2*pi*Songnote(i)*t);
   sound(normal, 1/Delta);
end

for i = 1:length(Notelength)
   t = 0:Delta:Notelength(i);
   partc = sin(2*2*pi*Songnote(i)*t);
   sound(normal, 1/Delta); 
end