This is quite fascinating in my opinion. Its a time lapse of Siegels footage with enhanced audio to emphasis the explosions.
Firstly, the recording has been sped up to approx 600%, this allows us to make new visual observations in terms of the progress of collapse. What is more revealing though is the audio. When you speed up the audio the very low bass frequencies that are often not picked up by laptop or low quality hifi speakers becomes audible, since your shifting the lower harmonics into a higher frequency range, although the sounds become shorter in length the audio details are still there.
Secondly, I filtered the audio dampening all frequencies above 200-300hz allowing for the bass (just the explosions) to pass through. You may notice people talking like chipmunks in the background which is the wins 10-10 news broadcast on fast forward. Its much quieter after the low pass filter and muffled some what. I am using Adobe Premier and I am not sure how the chain of effects go, whether its filtering before pitching or pitching then filtering i am unsure but I set the cutoff value to approx. the correct frequency to allow the audio to pass that we want to hear.
Thirdly, I compressed the audio signal using multi band compression - this balances the overall amplitude of the signal, making quiet sounds more audible. Using multi band I can apply the compression to just the bass area since this is the area of interest. After compressing the signal it suddenly became apparent there was much more details in the audio track than I once thought. Dozens of small scale charges can be heard going off in between the larger blasts. Listen very closely and you will heard countless small scale explosions.
Hope some of you find this interesting I certainly did! I recommend having your volume turned right up to hear the small charges or try listening on headphones. If you listen carefully to the very first explosion right at the end you can hear what sounds like a change in tension of the steel, its like that ping sounds that
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Firstly, the recording has been sped up to approx 600%, this allows us to make new visual observations in terms of the progress of collapse. What is more revealing though is the audio. When you speed up the audio the very low bass frequencies that are often not picked up by laptop or low quality hifi speakers becomes audible, since your shifting the lower harmonics into a higher frequency range, although the sounds become shorter in length the audio details are still there.
Secondly, I filtered the audio dampening all frequencies above 200-300hz allowing for the bass (just the explosions) to pass through. You may notice people talking like chipmunks in the background which is the wins 10-10 news broadcast on fast forward. Its much quieter after the low pass filter and muffled some what. I am using Adobe Premier and I am not sure how the chain of effects go, whether its filtering before pitching or pitching then filtering i am unsure but I set the cutoff value to approx. the correct frequency to allow the audio to pass that we want to hear.
Thirdly, I compressed the audio signal using multi band compression - this balances the overall amplitude of the signal, making quiet sounds more audible. Using multi band I can apply the compression to just the bass area since this is the area of interest. After compressing the signal it suddenly became apparent there was much more details in the audio track than I once thought. Dozens of small scale charges can be heard going off in between the larger blasts. Listen very closely and you will heard countless small scale explosions.
Hope some of you find this interesting I certainly did! I recommend having your volume turned right up to hear the small charges or try listening on headphones. If you listen carefully to the very first explosion right at the end you can hear what sounds like a change in tension of the steel, its like that ping sounds that