posted on Jun, 24 2006 @ 01:50 AM
okay, i checked it out.
you can hear what's going on. it's pretty clear, considering it's a compressed divx from a consumer quality original. wow. technology. is there
anything it CAN'T DO?
no. within physical law, no.
seismic is earth quaking or earth vibration. vibration is sound to me. it is just very low frequencies of extreme magnitude that are 'siesmic'
sounds. that is the way i 'picture it', whether my terminology is correct, or not.
okay, so, i listened to the wind(the wind on rick's tape, not some other wind, from some other mic, on some other recorder, with completely different
what i hear:
people on the peer talking. the radio playing 1010wins live reporting. the wind. helicopters(from the same-ish distance as the towers, sometimes
farther, sometimes closer, sometimes immediately on toip of, flashing lights through the copius smoke), sirens,distant traffic, and electrical hum
and/or motor noise from inside the camera. i can't remember. hi-8? dvd? anyway, not the quietest setup, whatever it is. presumably, the camera is
mounted directly on the video camera, and that is why you can hear the noise.
in my opinion, this recording was 'enhanced' by boosting the signal when the explosions are heard, in order to EMPHASIZE the sound of explosions,
making them more obvious to the viewer, much like say, circling something like hockey puck during a replay.
the recording shows it, but it is not obvious.
now, the way that the LOW FREQUENCIES can be emphasized, without making the [size=11]MIDS AND HIGHS [size=14]HARSH AND OVERBEARING, is
by splitting the audio into multiple narrow bandwidths, exactly the same as a crossover network in a speaker column. once the frequency bands are
seperated, they can be processed individually, bass, mids, and highs.
to jump ahead, the final audio track, has presumably been compressed as well, depending on rick's budget and resources, so that whatever changes are
made to the raw audio, may have be further changed(maximized for overall volume, nothing too quiet, nothing too loud).
and back. even WITHOUT splitting the frequency band, every compressor circuit has it's own spectral character, and so frequency bands will be
affected differently even within the one circuit of processing.
and so, if:
a. it was split into multiple bands, and each band compressed seperately, then, you would hear a JUMP in ALL the LOW frequencies when the explosions
are heard. this doesn't happen. the character of the sound does change. the low frequencies of the wind, helicopters, even the radio do not become
ENHANCED with the sound of the wind.
the voices that can be hear on the radio, and peer(the thing humans hear best, as per psycho-acoustics), become thinner. they LOSE low end. this
indicates that the explosions were probably very loud, in the low frequency range.
b. it was one compressor circuit....lower frequencies are related to higher ones by a sliding scale, where every octave lower has twice the energy of
the original. when a loud sound goes is translated into an electrical wave, by a microphone diaphram, each part of the chain has a 'character', and
changing any part in the circuit, be it a transistor or a reverb and eq, changes the overall character of the sound that eventually is translated back
into physical movement by the speakers. (wordy. sorry.) so, because backround sounds LOSE LOW END, the bandwidth is being SATURATED by BIGGER LOW
END. IF the wind noide was being boosted(the wind is the closest thing to the microphone), the ambient noise like helicopters and male voices on the
radio, would be drowned out.
there is no question in my mind that
a. the sounds are genuine recordings of explosions (i strongly feel this is the case, based on the audio alone, disregarding everything else i know
that points to demolition)
b. they were dubbed in using multi-track recording to mix multiple audio streams into a fake 'live' audio track. this is harder to disprove with a
simple analysis, and perhaps impossible, depending on the skill of the fakir.
i've just edited this for one thing. i think it's an unusually long post for me, and i'm sure there are errors.
oh, well. i hope to look at it again, but i'm already pretty sure that the 'enhancement' realy was an enhancement, and not a doctoring.
recorded sound has suffered a massive attack of entropy. you cannot easily unmix sounds once they are mixed together, no matter how much cowbell you
need. or how much bass.
[edit on 24-6-2006 by billybob]