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Originally Posted by ssamadhi97
Actually it's blatant aliasing introduced by bad resampling from 22.05kHz to 44.1kHz (check how the content above 11.025kHz is more or less just a flipped image of what's below). The "dropout" is there because the signal was lowpassed at 10kHz before this resampling process for some reason. Maybe a lossy audio encoder operating at a rather low bitrate. Who knows.
"If it sounds like ass, it's probably sourced from a 56kbps 22050Hz mp3" >_>
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Nice lesson ssamadhi. Thanks. I didn't notice the duplication in the freq graph, but to be honest, I was just transfixed by the huge notch
Good to always be learning the fine points.... Thanks for sharing an excellent observation.
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