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|      \\  /_   _// | \  / ||  /_   _//  / ____|| 
|  --  //   -| ||-  |  \/  ||   -| ||-  / //---`' 
|  --  \\   _| ||_  | .  . ||   _| ||_  \ \\___   
|______//  /_____// |_|\/|_||  /_____//  \_____|| 
`------`   `-----`  `-`  `-`   `-----`    `----`

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Text this: Spectral estimation using digital filtering