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%
% Programmer and Purdue Email Address:
% 1.Alberto Peralta aperalta@purdue.edu
%
% Homework #:01
%
%
%
%
%
% Program Description:This program will attempt to play Smoke in the water in its
% original speed, then two times faster and then with an octave higher,
% lasting half the time, afterwards, a song written by the Beatles will be played
% backwards, and a hidden message, if any, will be discovered.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%/
tempo=(60/112);
Sol=(2^(-2/12))*440;
Sib=(2^(1/12))*440;
Do=(2^(3/12))*440;
Reb=(2^(4/12))*440;
deltat = .00005;
negra=0:deltat:1*tempo;
puntillo=0:deltat:1.5*tempo;
corchea=0:deltat:.5*tempo;
blanca=0:deltat:2*tempo;
silencio= 0:deltat:2.5*tempo;
SolN= sin(2*pi*Sol*negra);
SiN= sin(2*pi*Sib*negra);
DoP= sin(2*pi*Do*puntillo);
DoB= sin(2*pi*Do*blanca);
ReC= sin(2*pi*Reb*corchea);
silencioP= sin(silencio);
Smoke=[SolN, SiN, DoP,SolN, SiN ,ReC,DoB,SolN, SiN,DoP,SiN,SolN,silencioP];
sound(Smoke, 1/delta);
wavwrite(Smoke,1/delta,32, 'Normal Speed')
tempo=(60/112)/2;
negra=0:deltat:1*tempo;
puntillo=0:deltat:1.5*tempo;
corchea=0:deltat:.5*tempo;
blanca=0:deltat:2*tempo;
silencio= 0:deltat:2.5*tempo;
SolN= sin(2*pi*Sol*negra);
SiN= sin(2*pi*Sib*negra);
DoP= sin(2*pi*Do*puntillo);
DoB= sin(2*pi*Do*blanca);
ReC= sin(2*pi*Reb*corchea);
silencioP= sin(silencio);
Smoke=[SolN, SiN, DoP,SolN, SiN ,ReC,DoB,SolN, SiN,DoP,SiN,SolN,silencioP];
sound(Smoke, 1/delta);
wavwrite(Smoke,1/delta,32, 'Faster Speed')
SolN= sin(4*pi*Sol*negra);
SiN= sin(4*pi*Sib*negra);
DoP= sin(4*pi*Do*puntillo);
DoB= sin(4*pi*Do*blanca);
ReC= sin(4*pi*Reb*corchea);
silencioP= sin(silencio);
Smoke=[SolN, SiN, DoP,SolN, SiN ,ReC,DoB,SolN, SiN,DoP,SiN,SolN,silencioP];
sound(Smoke, 1/delta);
wavwrite(Smoke,1/delta,32, 'x(2t) ')
Y= wavread('Beatles');
F = flipud(Y);
sound(Y, Fs)
wavwrite(F,1/delta,32, 'Flipped Beatles ')
%The forward message of this Beatles song is Number 9
%When the flipud function was used it was hard to retrieve
%any message with any sense out of the file. I picked up some
%words like 'turn' and 'on'though. I dont think there is a real
%hidden message in this song.
Media:Normal_Speed.wav
Media:Faster_Speed.wav
Media:Partc.wav
Media:Flipped_Beatles_.wav
