weird spectral analysis- 10K-13K completely missing

[brownness]

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]

noise reduction?

[paddington]

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]

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]

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