Hw1 ECE301S11 Dan Sabo - Rhea

%Daniel Sabo
%ECE 301
%HW 1

%Part 1

delta = .00005;

bps = 112/60;

whole = 0:delta:bps;
half = 0:delta:bps/2;
quarter = 0:delta:bps/4;
eighth = 0:delta:bps/8;
dotted_q = 0:delta:bps*.375;

G = 391.995;
Bf = 466.164;
C = 523.251;
Df = 554.365;

note_G = sin(2*pi*G*quarter);
note_Bf = sin(2*pi*Bf*quarter);
note_C_dotted = sin(2*pi*C*dotted_q);
note_C_half = sin(2*pi*C*half);
note_Df = sin(2*pi*Df*eigth);

normal = [note_G,note_Bf,note_C_dotted,note_G,note_Bf,note_Df,note_C_half,note_G,note_Bf,note_C_dotted,note_Bf,note_G];

bps = bps/2;

whole = 0:delta:bps;
half = 0:delta:bps/2;
quarter = 0:delta:bps/4;
eigth = 0:delta:bps/8;
dotted_q = 0:delta:bps*.375;

note_G = sin(2*pi*G*quarter);
note_Bf = sin(2*pi*Bf*quarter);
note_C_dotted = sin(2*pi*C*dotted_q);
note_C_half = sin(2*pi*C*half);
note_Df = sin(2*pi*Df*eigth);

faster = [note_G,note_Bf,note_C_dotted,note_G, note_Bf,note_Df,note_C_half,note_G,note_Bf,note_C_dotted,note_Bf,note_G];

whole = 0:delta:bps;
half = 0:delta:bps/2;
quarter = 0:delta:bps/4;
eigth = 0:delta:bps/8;
dotted_q = 0:delta:bps*.375;

G = 2*G;
Bf = 2*Bf;
C = 2*C;
Df = 2*Df;

note_G = sin(2*pi*G*quarter);
note_Bf = sin(2*pi*Bf*quarter);
note_C_dotted = sin(2*pi*C*dotted_q);
note_C_half = sin(2*pi*C*half);
note_Df = sin(2*pi*Df*eigth);

higher = [note_G,note_Bf,note_C_dotted,note_G,note_Bf,note_Df,note_C_half,note_G,note_Bf,note_C_dotted,note_Bf,note_G];

wavwrite(normal, 1/delta,'Normal');
wavwrite(faster, 1/delta,'Twice_Speed');
wavwrite(higher, 1/delta,'Higher_Pitch');

%Part 2
[beatles, fs, bits] = wavread('Beatles.wav');
sound(beatles, fs, bits);
reverse = flipud(beatles);
sound(reverse,fs);
wavwrite(reverse,fs,'Beatles_Reverse');

%I hear "Turn me on Desmond". Who Desmond is I have no idea.