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| + | == 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 | ||
| + | %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'); | ||
Latest revision as of 17:52, 3 September 2008
Wav Files
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');
