(New page: == Sound Files == == Matlab Code == == Results ==)
 
(Results)
 
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== Sound Files ==
 
== Sound Files ==
 +
* [[Media:Forward44k_ECE301Fall2008mboutin.wav|Forward 44k]]
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* [[Media:Backward44k_ECE301Fall2008mboutin.wav|Backward 44k]]
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* [[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
  
== Results ==
+
%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
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%44khz.
 +
 
 +
[x,fs,nbits]=wavread('jpforward.wav');
 +
 
 +
%Reverse the matrix array
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for count=1:length(x)
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    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');

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