Difference between revisions of "HW1.1 Hetong Li ECE301Fall2008mboutin" - Rhea

Latest revision as of 17:52, 3 September 2008

Wav Files

a. part a (normal speed)
b. part b (fast speed)
c. part c (higher pitch)

Matlab Code

%Hetong Li
%09/01/08
%ECE301 hw1.1

clear;
clc;

% PART A

delta = 0.0005;
H=0:delta: 1;          %half
Q=0:delta:0.5;         %quacter
DQ_time=0:delta:0.75;  %dotted quacter
EN=0:delta:0.25;       %one eighth

%Assign signals for each used note
AH = sin(2*pi*220*H);
BQ= sin(2*pi*493.88/2*Q);
DBQ=sin(2*pi*277.18*Q);
DDQ = sin(2*pi*293.66*DQ_time);
DQ = sin(2*pi*293.66*Q);
EEN =sin(2*pi*329.63*EN);
GBQ=sin(2*pi*369.99*Q);
GQ=sin(2*pi*392*Q);
GEN=sin(2*pi*392*EN);
FEN= sin(2*pi*349.23*EN);
GBEN=sin(2*pi*369.99*EN);

notes= [AH BQ DBQ DDQ EEN GBQ GBQ GQ GEN GEN DQ EEN FEN GBEN];

sound (notes,1/delta);
wavwrite(notes,1/delta,32,'music-a.wav');

% PART B

%half the duration
%we will hear the some plays at twice speed as before

delta = 0.0005;
H=0:delta: 0.5;
Q=0:delta:0.25;
DQ_time=0:delta:0.375;
EN=0:delta:0.125;

AH = sin(2*pi*220*H);
BQ= sin(2*pi*493.88/2*Q);
DBQ=sin(2*pi*277.18*Q);
DDQ = sin(2*pi*293.66*DQ_time);
DQ = sin(2*pi*293.66*Q);
EEN =sin(2*pi*329.63*EN);
GBQ=sin(2*pi*369.99*Q);
GQ=sin(2*pi*392*Q);
GEN=sin(2*pi*392*EN);
FEN= sin(2*pi*349.23*EN);
GBEN=sin(2*pi*369.99*EN);

notes= [AH BQ DBQ DDQ EEN GBQ GBQ GQ GEN GEN DQ EEN FEN GBEN];

sound (notes,1/delta);
wavwrite(notes,1/delta,32,'music-b.wav');

% PART C

%Change the duration back to part a
delta = 0.0005;
H=0:delta: 1;
Q=0:delta:0.5;
DQ_time=0:delta:0.75;
EN=0:delta:0.25;

%as we replace t with 2t,so double the time in signal function
%which also means double the frequency of each signal
%we will hear a song with higher pitch

AH = sin(2*pi*2*220*H);
BQ= sin(2*pi*2*493.88/2*Q);
DBQ=sin(2*pi*2*277.18*Q);
DDQ = sin(2*pi*2*293.66*DQ_time);
DQ = sin(2*pi*2*293.66*Q);
EEN =sin(2*pi*2*329.63*EN);
GBQ=sin(2*pi*2*369.99*Q);
GQ=sin(2*pi*2*392*Q);
GEN=sin(2*pi*2*392*EN);
FEN= sin(2*pi*2*349.23*EN);
GBEN=sin(2*pi*2*369.99*EN);

notes= [AH BQ DBQ DDQ EEN GBQ GBQ GQ GEN GEN DQ EEN FEN GBEN];


sound (notes,1/delta);
wavwrite(notes,1/delta,32,'music-c.wav');

@@ Line 1: / Line 1: @@
+== Wav Files ==
+* a. [[Media: music-a_ECE301Fall2008mboutin.wav|part a]] (normal speed)
+* b. [[Media: music-b_ECE301Fall2008mboutin.wav|part b]] (fast speed)
+* c. [[Media: music-c_ECE301Fall2008mboutin.wav|part c]] (higher pitch)
+== Matlab Code ==
+<pre>
 %Hetong Li
 %09/01/08
@@ Line 5: / Line 13: @@
 clear;
 clc;
-%initialze basic variables
-x=440*3/5;%basic frequency.
-delta=0.0005;
-dur=0.5;
-t=0:delta:dur;
-scale=1;
-%assign frequencies for each tone.
+% PART A
-fmidC=x;
-fD=9*x/8;
+delta = 0.0005;
-fE=5*x/4;
+H=0:delta: 1;          %half
-fF=4*x/3;
+Q=0:delta:0.5;         %quacter
-fG=3*x/2;
+DQ_time=0:delta:0.75;  %dotted quacter
-fA=5*x/3;
+EN=0:delta:0.25;       %one eighth
-fB=15*x/8;
-fupC=2*x;
+%Assign signals for each used note
+AH = sin(2*pi*220*H);
+BQ= sin(2*pi*493.88/2*Q);
+DBQ=sin(2*pi*277.18*Q);
+DDQ = sin(2*pi*293.66*DQ_time);
+DQ = sin(2*pi*293.66*Q);
+EEN =sin(2*pi*329.63*EN);
+GBQ=sin(2*pi*369.99*Q);
+GQ=sin(2*pi*392*Q);
+GEN=sin(2*pi*392*EN);
+FEN= sin(2*pi*349.23*EN);
+GBEN=sin(2*pi*369.99*EN);
+notes= [AH BQ DBQ DDQ EEN GBQ GBQ GQ GEN GEN DQ EEN FEN GBEN];
+sound (notes,1/delta);
+wavwrite(notes,1/delta,32,'music-a.wav');
+% PART B
+%half the duration
+%we will hear the some plays at twice speed as before
+delta = 0.0005;
+H=0:delta: 0.5;
+Q=0:delta:0.25;
+DQ_time=0:delta:0.375;
+EN=0:delta:0.125;
+AH = sin(2*pi*220*H);
+BQ= sin(2*pi*493.88/2*Q);
+DBQ=sin(2*pi*277.18*Q);
+DDQ = sin(2*pi*293.66*DQ_time);
+DQ = sin(2*pi*293.66*Q);
+EEN =sin(2*pi*329.63*EN);
+GBQ=sin(2*pi*369.99*Q);
+GQ=sin(2*pi*392*Q);
+GEN=sin(2*pi*392*EN);
+FEN= sin(2*pi*349.23*EN);
+GBEN=sin(2*pi*369.99*EN);
+notes= [AH BQ DBQ DDQ EEN GBQ GBQ GQ GEN GEN DQ EEN FEN GBEN];
+sound (notes,1/delta);
+wavwrite(notes,1/delta,32,'music-b.wav');
+% PART C
+%Change the duration back to part a
+delta = 0.0005;
+H=0:delta: 1;
+Q=0:delta:0.5;
+DQ_time=0:delta:0.75;
+EN=0:delta:0.25;
+%as we replace t with 2t,so double the time in signal function
+%which also means double the frequency of each signal
+%we will hear a song with higher pitch
-part = input('Please choose the part you want to play(a,b,c):','s');
+AH = sin(2*pi*2*220*H);
+BQ= sin(2*pi*2*493.88/2*Q);
+DBQ=sin(2*pi*2*277.18*Q);
+DDQ = sin(2*pi*2*293.66*DQ_time);
+DQ = sin(2*pi*2*293.66*Q);
+EEN =sin(2*pi*2*329.63*EN);
+GBQ=sin(2*pi*2*369.99*Q);
+GQ=sin(2*pi*2*392*Q);
+GEN=sin(2*pi*2*392*EN);
+FEN= sin(2*pi*2*349.23*EN);
+GBEN=sin(2*pi*2*369.99*EN);
-if(strcmp(part,'a'))
+notes= [AH BQ DBQ DDQ EEN GBQ GBQ GQ GEN GEN DQ EEN FEN GBEN];
-    dur=0.5;
-elseif(strcmp(part,'b'))
-    dur=0.25;
-elseif(strcmp(part,'c'))
-    scale=2;
-else
-    fprintf('Sorry,there is no corresponding part');
-end
-t=0:delta:dur;
-%assign signals of each tone.
-midC=sin(2*pi*fmidC*t*scale);
-D=sin(2*pi*fD*t*scale);
-E=sin(2*pi*fE*t*scale);
-F=sin(2*pi*fF*t*scale);
-G=sin(2*pi*fG*t*scale);
-A=sin(2*pi*fA*t*scale);
-B=sin(2*pi*fB*t*scale);
-upC=sin(2*pi*fupC*t*scale);
-y=[midC,midC,G,G,A,A,G,G,F,F,E,E,D,D,midC];
+sound (notes,1/delta);
-sound(y,1/delta);
+wavwrite(notes,1/delta,32,'music-c.wav');

Difference between revisions of "HW1.1 Hetong Li ECE301Fall2008mboutin" - Rhea

Latest revision as of 17:52, 3 September 2008

Wav Files

Matlab Code

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