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Thread: FDK aac encoder bandwidth never goes beyond 20 KHz even after setting -w 22050

  1. #1

    Join Date
    May 2014
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    2

    Lightbulb FDK aac encoder bandwidth never goes beyond 20 KHz even after setting -w 22050

    FDK aac encoder bandwidth never goes beyond 20 KHz even after setting -w 22050 (cutoff freq) which does not happen in itunes aac or winamp Fraunhoffer aac. I looked through source code to find out but I am not that experienced I guess. That is why I am posting it here. I am posting two images one is from itunes aac and another (which showing 20 KHz) is dbpoweramp fdk. Using updated FDK version 3.4.12 which I compiled this morning ! Hope somebody fixes this issue. Other wise sound quality is fine.08 - Medicine (feat. Blake Shelton).m4a.jpg
    08 - Medicine (feat. Blake Shelton)FDK.m4a.jpg
    Last edited by Romberg; 05-12-2014 at 01:41 PM.

  2. #2
    Administrator
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    Apr 2002
    Posts
    42,832

    Re: FDK aac encoder bandwidth never goes beyond 20 KHz even after setting -w 22050

    It is likely the codec overrides the frequency cut off depending on bit rate. For a lossy codec potentially there is better overall quality by cutting the frequencies, because most people cannot hear that high.

  3. #3

    Join Date
    May 2014
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    2

    Re: FDK aac encoder bandwidth never goes beyond 20 KHz even after setting -w 22050

    Thank you for the info spoon.

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