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% Professor Mimi Boutin | % Professor Mimi Boutin | ||
− | % Part 1 | + | % Part 1 <br> |
− | clear | + | clear<br> |
− | clc | + | clc<br> |
− | delta = 0.00005; | + | delta = 0.00005;<br> |
+ | |||
+ | % A loop is made to separate Question 1 into 3 parts<br> | ||
− | |||
for p = 1:3 | for p = 1:3 | ||
if p ==2 | if p ==2 | ||
Line 56: | Line 57: | ||
end | end | ||
− | [[Media:Normal melody.wav]] | + | [[Media:Normal melody.wav]] <br> |
− | [[Media:Faster melody.wav]] | + | [[Media:Faster melody.wav]]<br> |
− | [[Media:Transformation x(2t).wav]] | + | [[Media:Transformation x(2t).wav]]<br> |
+ | |||
+ | % Part 2<br> | ||
+ | |||
+ | clear<br> | ||
− | + | clc<br> | |
− | + | % Use wavread to read and store the Beatles song<br> | |
− | clc | + | [song,Fs] = wavread('Beatles.wav');<br> |
− | % Use wavread to read and store the Beatles song | + | song_reversed = flipud(song); % this will flip the song and play it in reverse <br> |
− | [song,Fs] = wavread('Beatles.wav'); | + | sound(song_reversed,Fs);<br> |
− | song_reversed = flipud(song); % this will flip the song and play it in reverse | + | |
− | sound(song_reversed,Fs); | + | |
− | The song played in forward say "Number Nine". | + | The song played in forward say "Number Nine".<br> |
− | When it is played in reversed the sound that comes out is "Turn me on dead man". | + | When it is played in reversed the sound that comes out is "Turn me on dead man".<br> |
Latest revision as of 08:54, 19 January 2011
% Sharifah Fareena Aljunid % BME 301 Homework 1 % Professor Mimi Boutin
% Part 1
clear
clc
delta = 0.00005;
% A loop is made to separate Question 1 into 3 parts
for p = 1:3
if p ==2 bpm = 112*2; % indicating the tune will be twice as fast else bpm = 112; % normal beats per minute end % Calculation to determine the length of the in seconds H = 0:delta:(2*60/bpm); Q = 0:delta:(1*60/bpm); E = 0:delta:(0.5*60/bpm); DQ = 0:delta:(1.5*60/bpm); % Part 3, rescaling the frequency of A4 if p == 3 fa = 880; % the frequency is double the original as y(t) = x(2t) else fa = 440; % original frequency of A4 end % Calculation of the frequency of any note related to the frequency of A4 fG = 2^(-2/12)*fa; fC = 2^(3/12)*fa; fBf = 2^(1/12)*fa; fDf = 2^(4/12)*fa; % Calculation of all note length using a sine wave GQ = sin(2*pi*fG*Q); BfQ = sin(2*pi*fBf*Q); CDQ = sin(2*pi*fC*DQ); DfE = sin(2*pi*fDf*E); CH = sin(2*pi*fC*H); % The tune of the song to be played z = [GQ, BfQ, CDQ, GQ, BfQ, DfE, CH, GQ, BfQ, CDQ, BfQ, GQ]; sound(z,1/delta); % Adjust song according to what is asked for in Question 1 if p == 1 wavwrite(z,1/delta,32,'Normal melody') elseif p == 2 wavwrite(z,1/delta,32,'Faster melody') else wavwrite(z,1/delta,32,'Transformation x(2t)') end
end
Media:Normal melody.wav
Media:Faster melody.wav
Media:Transformation x(2t).wav
% Part 2
clear
clc
% Use wavread to read and store the Beatles song
[song,Fs] = wavread('Beatles.wav');
song_reversed = flipud(song); % this will flip the song and play it in reverse
sound(song_reversed,Fs);
The song played in forward say "Number Nine".
When it is played in reversed the sound that comes out is "Turn me on dead man".