I've been playing and playing with all the audio files, trying all sorts of stuff. I'm only trying to post findings that I believe are or could be relevant. I came up with this.
Less Than:
I took both the single and album versions, I reversed the polarity on one. They almost cancel each other out. Someone mentioned this technique was used in Capital G during the Year Zero ARG to discover something, although I do not recall this. But I figured it was worth a try and so I listened and payed close attention to the spectrograph. I also used Audacity's spectrogragh and I discovered a lot of little squares, very similar to the block code squares, placed throughout.
The audio file for this is here, if you would like to look through it yourself:
https://drive.google.com/open?id=0B3...044SVdpRFRORUk
This Isn't The Place:
I tried the same technique with this, but I didn't find anything of not:
https://drive.google.com/open?id=0B3...HBMYTE2dmdteVk
However, I did notice what at first seemed like silence in the beginning of the video version of the song, but when amplified became a little more. Not to get hopes up, but I clearly hear a ringing sound and also what I believe to be a voice saying one or two words. I cannot seem to isolate the voice from the noise, so if you would like to give it a go, I'll include the files below. This is probably just some normal noise in the studio though.
Original (Amplified):
https://drive.google.com/open?id=0B3...kc1TlJmOUpKN2c
Left Track (Stereo):
https://drive.google.com/open?id=0B3...S0wd1dfYnJjdjA
Right Track (Stereo):
https://drive.google.com/open?id=0B3...DFoUEdHOVR4bVE