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Lossy or Lossless? Please use this forum to post spectral and frequency analysis posts about shows you have your doubts about.

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  #1  
Old 2007-03-27, 01:17 PM
brownness brownness is offline
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weird spectral analysis- 10K-13K completely missing

any ideas on this? I've never seen anything like it before. I would post the pic, but it's not really necessary. All of the higher frequencies are there, but there is a solid black bar through the middle of the graph through the entire song. from around 10K to 13K - nothing.
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  #2  
Old 2007-03-27, 10:51 PM
rhinowing rhinowing is offline
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Re: weird spectral analysis- 10K-13K completely missing

noise reduction?
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  #3  
Old 2007-03-28, 09:35 PM
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paddington paddington is offline
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Re: weird spectral analysis- 10K-13K completely missing

yeah, it sounds like some jackass was trying to remove some noise - say, a tape whine, etc. Obviously, notching out 3kHz isn't the most ideal way.
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Old 2007-03-29, 02:23 PM
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Five Five is offline
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Re: weird spectral analysis- 10K-13K completely missing

I've seen that a few times before, not certain what causes it. I got it once on the audio from a VHS I transferred via SB Live! one time. I can't explain it, but I'm pretty certain it isn't caused by lossy encoding fwiw
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  #5  
Old 2007-05-19, 03:43 PM
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markshan markshan is offline
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Re: weird spectral analysis- 10K-13K completely missing

Wasn't there some short lived copyguard system that notched out around that frequency?
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