(New page: % Hale Petersen % ECE 301 HW # 1 clc % Q.1 - Part 1: original tempo BPM = 112; % beats per minute BPS = 60/BPM; % beats per second delta = 0.00005; Q = [0:delta:BPS]; E = [0:delta:BPS/...)
 
 
(2 intermediate revisions by the same user not shown)
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% Hale Petersen
+
% Hale Petersen
 +
% ECE 301 HW # 1
  
−
% ECE 301 HW # 1
+
clc
  
−
clc
+
% Q.1 - Part 1: original tempo
 +
BPM = 112; % beats per minute
 +
BPS = 60/BPM; % beats per second
 +
delta = 0.00005; % Time step
 +
Q = [0:delta:BPS];
 +
E = [0:delta:BPS/2];
 +
DQ = [0:delta:BPS*1.5];
 +
H = [0:delta:BPS*2];
  
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% Q.1 - Part 1: original tempo
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%Notes
 +
Q_G = sin(2*pi*(2^(-2/12)*440)*Q);
 +
Q_BF = sin(2*pi*(2^(1/12)*440)*Q);
 +
DQ_C = sin(2*pi*(2^(3/12)*440)*DQ);
 +
E_DF = sin(2*pi*(2^(4/12)*440)*E);
 +
H_C = sin(2*pi*(2^(3/12)*440)*H);
  
−
BPM = 112; % beats per minute
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song1 = [Q_G, Q_BF, DQ_C, Q_G, Q_BF, E_DF, H_C, Q_G, Q_BF, DQ_C, Q_BF, Q_G];
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BPS = 60/BPM; % beats per second
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sound(song1, 1/delta);
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delta = 0.00005;
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pause(10);
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Q = [0:delta:BPS];
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E = [0:delta:BPS/2];
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DQ = [0:delta:BPS*1.5];
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H = [0:delta:BPS*2];
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%Notes
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% Part 2: 2 times faster by dividing the BPS by 2
 +
Q = [0:delta:BPS/2];
 +
E = [0:delta:BPS/4];
 +
DQ = [0:delta:BPS*1.5/2];
 +
H = [0:delta:BPS];
  
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Q_G = sin(2*pi*(2^(-2/12)*440)*Q);
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%Notes
−
Q_BF = sin(2*pi*(2^(1/12)*440)*Q);
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Q_G = sin(2*pi*(2^(-2/12)*440)*Q);
−
DQ_C = sin(2*pi*(2^(3/12)*440)*DQ);
+
Q_BF = sin(2*pi*(2^(1/12)*440)*Q);
−
E_DF = sin(2*pi*(2^(4/12)*440)*E);
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DQ_C = sin(2*pi*(2^(3/12)*440)*DQ);
−
H_C = sin(2*pi*(2^(3/12)*440)*H);
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E_DF = sin(2*pi*(2^(4/12)*440)*E);
 +
H_C = sin(2*pi*(2^(3/12)*440)*H);
  
−
song1 = [Q_G, Q_BF, DQ_C, Q_G, Q_BF, E_DF, H_C, Q_G, Q_BF, DQ_C, Q_BF, Q_G];
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song2 = [Q_G, Q_BF, DQ_C, Q_G, Q_BF, E_DF, H_C, Q_G, Q_BF, DQ_C, Q_BF, Q_G];
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sound(song1, 1/delta);
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sound(song2, 1/delta);
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pause(10);
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pause(10);
  
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% Part 2: 2 times faster
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% part 3: rescaling by doubling the frequency to 880
 +
Q = [0:delta:BPS];
 +
E = [0:delta:BPS/2];
 +
DQ = [0:delta:BPS*1.5];
 +
H = [0:delta:BPS*2];
  
−
Q = [0:delta:BPS/2];
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%Notes
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E = [0:delta:BPS/4];
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Q_G = sin(2*pi*(2^(-2/12)*880)*Q);
−
DQ = [0:delta:BPS*1.5/2];
+
Q_BF = sin(2*pi*(2^(1/12)*880)*Q);
−
H = [0:delta:BPS];
+
DQ_C = sin(2*pi*(2^(3/12)*880)*DQ);
 +
E_DF = sin(2*pi*(2^(4/12)*880)*E);
 +
H_C = sin(2*pi*(2^(3/12)*880)*H);  
  
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%Notes
+
song3 = [Q_G, Q_BF, DQ_C, Q_G, Q_BF, E_DF, H_C, Q_G, Q_BF, DQ_C, Q_BF, Q_G];
 +
sound(song3, 1/delta);
 +
pause(10);
  
−
Q_G = sin(2*pi*(2^(-2/12)*440)*Q);
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% Q.2 Hidden backward message
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Q_BF = sin(2*pi*(2^(1/12)*440)*Q);
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[beatles, Fs] = wavread('Beatles.wav');
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DQ_C = sin(2*pi*(2^(3/12)*440)*DQ);
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beatles_reverse = flipud(beatles);
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E_DF = sin(2*pi*(2^(4/12)*440)*E);
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sound(beatles_reverse,Fs);
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H_C = sin(2*pi*(2^(3/12)*440)*H);
+
  
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song2 = [Q_G, Q_BF, DQ_C, Q_G, Q_BF, E_DF, H_C, Q_G, Q_BF, DQ_C, Q_BF, Q_G];
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%Q.1 - The forward repeating phrase is "number nine"
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sound(song2, 1/delta);
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%Q.2 - I believe the reverse says "turn me on dead man"
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pause(10);
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−
 
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% part 3: rescale
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−
 
+
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Q = [0:delta:BPS];
+
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E = [0:delta:BPS/2];
+
−
DQ = [0:delta:BPS*1.5];
+
−
H = [0:delta:BPS*2];
+
−
 
+
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%Notes
+
−
 
+
−
Q_G = sin(2*pi*(2^(-2/12)*880)*Q);
+
−
Q_BF = sin(2*pi*(2^(1/12)*880)*Q);
+
−
DQ_C = sin(2*pi*(2^(3/12)*880)*DQ);
+
−
E_DF = sin(2*pi*(2^(4/12)*880)*E);
+
−
H_C = sin(2*pi*(2^(3/12)*880)*H);
+
−
 
+
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song3 = [Q_G, Q_BF, DQ_C, Q_G, Q_BF, E_DF, H_C, Q_G, Q_BF, DQ_C, Q_BF, Q_G];
+
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sound(song3, 1/delta);
+
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pause(10);
+
−
 
+
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% Q.2 Hidden backward message
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−
 
+
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[beatles, Fs] = wavread('Beatles.wav');
+
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beatles_reverse = flipud(beatles);
+
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sound(beatles_reverse,Fs);
+
−
 
+
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%Q.1 - The forward repeating phrase is "number nine"
+
−
 
+
−
%Q.2 - I believe the reverse says "turn me on dead man"
+

Latest revision as of 10:48, 19 January 2011

% Hale Petersen
% ECE 301 HW # 1

clc

% Q.1 - Part 1: original tempo
BPM = 112; % beats per minute
BPS = 60/BPM; % beats per second
delta = 0.00005; % Time step
Q = [0:delta:BPS];
E = [0:delta:BPS/2];
DQ = [0:delta:BPS*1.5];
H = [0:delta:BPS*2];

%Notes
Q_G = sin(2*pi*(2^(-2/12)*440)*Q);
Q_BF = sin(2*pi*(2^(1/12)*440)*Q);
DQ_C = sin(2*pi*(2^(3/12)*440)*DQ);
E_DF = sin(2*pi*(2^(4/12)*440)*E);
H_C = sin(2*pi*(2^(3/12)*440)*H);

song1 = [Q_G, Q_BF, DQ_C, Q_G, Q_BF, E_DF, H_C, Q_G, Q_BF, DQ_C, Q_BF, Q_G];
sound(song1, 1/delta);
pause(10);

% Part 2: 2 times faster by dividing the BPS by 2
Q = [0:delta:BPS/2];
E = [0:delta:BPS/4];
DQ = [0:delta:BPS*1.5/2];
H = [0:delta:BPS];

%Notes
Q_G = sin(2*pi*(2^(-2/12)*440)*Q);
Q_BF = sin(2*pi*(2^(1/12)*440)*Q);
DQ_C = sin(2*pi*(2^(3/12)*440)*DQ);
E_DF = sin(2*pi*(2^(4/12)*440)*E);
H_C = sin(2*pi*(2^(3/12)*440)*H);

song2 = [Q_G, Q_BF, DQ_C, Q_G, Q_BF, E_DF, H_C, Q_G, Q_BF, DQ_C, Q_BF, Q_G];
sound(song2, 1/delta);
pause(10);

% part 3: rescaling by doubling the frequency to 880
Q = [0:delta:BPS];
E = [0:delta:BPS/2];
DQ = [0:delta:BPS*1.5];
H = [0:delta:BPS*2]; 

%Notes
Q_G = sin(2*pi*(2^(-2/12)*880)*Q);
Q_BF = sin(2*pi*(2^(1/12)*880)*Q);
DQ_C = sin(2*pi*(2^(3/12)*880)*DQ);
E_DF = sin(2*pi*(2^(4/12)*880)*E);
H_C = sin(2*pi*(2^(3/12)*880)*H); 

song3 = [Q_G, Q_BF, DQ_C, Q_G, Q_BF, E_DF, H_C, Q_G, Q_BF, DQ_C, Q_BF, Q_G];
sound(song3, 1/delta);
pause(10);

% Q.2 Hidden backward message
[beatles, Fs] = wavread('Beatles.wav');
beatles_reverse = flipud(beatles);
sound(beatles_reverse,Fs);

%Q.1 - The forward repeating phrase is "number nine"
%Q.2 - I believe the reverse says "turn me on dead man"
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