HW1.2 Phil Cannon ECE301Fall2008mboutin - Rhea

Sound Files

• Forward 44k
• Backward 44k
• 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

%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');