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View Full Version : weird spectral analysis- 10K-13K completely missing


brownness
2007-03-27, 02:17 PM
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. :hmm:

rhinowing
2007-03-27, 11:51 PM
noise reduction?

paddington
2007-03-28, 10:35 PM
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.

Five
2007-03-29, 03:23 PM
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

markshan
2007-05-19, 04:43 PM
Wasn't there some short lived copyguard system that notched out around that frequency?