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== Sound Files == | == Sound Files == | ||
* [[Media:Forward44k_ECE301Fall2008mboutin.wav|Forward 44k]] | * [[Media:Forward44k_ECE301Fall2008mboutin.wav|Forward 44k]] | ||
* [[Media:Backward44k_ECE301Fall2008mboutin.wav|Backward 44k]] | * [[Media:Backward44k_ECE301Fall2008mboutin.wav|Backward 44k]] | ||
* [[Media:Backward22k_ECE301Fall2008mboutin.wav|Backward 22k]] | * [[Media:Backward22k_ECE301Fall2008mboutin.wav|Backward 22k]] | ||
| + | |||
| + | |||
| + | == Results == | ||
| + | In the foward version it sounds like he says "Beyond the realms of death". Backwards it sounds like "I took my own life". | ||
== Matlab Code == | == Matlab Code == | ||
| + | <pre> | ||
| + | %Phil Cannon | ||
| + | %pjcannon@purdue.edu | ||
| + | %ECE301 HW1_2 | ||
| − | == | + | %This file imports the file 'jpforward.wav' in the local directory. It |
| + | %then plays the file forwards at 44khz, backwards at 44khz, and backwards | ||
| + | %at 22khz. I found it easiest to interpret the subliminal message at | ||
| + | %44khz. | ||
| + | |||
| + | [x,fs,nbits]=wavread('jpforward.wav'); | ||
| + | |||
| + | %Reverse the matrix array | ||
| + | for count=1:length(x) | ||
| + | jpbackward(length(x)-(count-1))=x(count); | ||
| + | end | ||
| + | |||
| + | %Forwards at 44100 Hz | ||
| + | wavplay(x,44100) | ||
| + | wavwrite(x, 44100, 'Forward44k.wav'); | ||
| + | |||
| + | %Backwards at 44100 Hz | ||
| + | wavplay(jpbackward,44100) | ||
| + | wavwrite(jpbackward, 44100, 'Backward44k.wav'); | ||
| + | |||
| + | %Backwards at 22050 Hz | ||
| + | wavplay(jpbackward,22050) | ||
| + | wavwrite(jpbackward, 22050, 'Backward22k.wav'); | ||
| + | </pre> | ||
Latest revision as of 12:34, 4 September 2008
Sound Files
Results
In the foward version it sounds like he says "Beyond the realms of death". Backwards it sounds like "I took my own life".
Matlab Code
%Phil Cannon
%pjcannon@purdue.edu
%ECE301 HW1_2
%This file imports the file 'jpforward.wav' in the local directory. It
%then plays the file forwards at 44khz, backwards at 44khz, and backwards
%at 22khz. I found it easiest to interpret the subliminal message at
%44khz.
[x,fs,nbits]=wavread('jpforward.wav');
%Reverse the matrix array
for count=1:length(x)
jpbackward(length(x)-(count-1))=x(count);
end
%Forwards at 44100 Hz
wavplay(x,44100)
wavwrite(x, 44100, 'Forward44k.wav');
%Backwards at 44100 Hz
wavplay(jpbackward,44100)
wavwrite(jpbackward, 44100, 'Backward44k.wav');
%Backwards at 22050 Hz
wavplay(jpbackward,22050)
wavwrite(jpbackward, 22050, 'Backward22k.wav');
