Re: AAC/MPEG-4 frequency response

Alex Stapleton <[email protected]>
Newsgroups gmane.comp.ipod.ephpod
Message-ID <[email protected]>
Erm. What codec and settings did you use to make the AAC files?
and a 10-12k lowpass sounds pretty insane to me. Xing uses 16k
and thats noticibly crap, so 10-12k would totally cripple the sound.


On Thu, 15 May 2003 12:49:02 -0500, N Sharp <[email protected]> wrote:

>
> Anyone else noticed this?  When I play AAC/MPEG-4 files, the "spectrum 
> analyser" in Nero Wave Editor and in WinAmp seem to indicate that there 
> are no frequencies beyond about 10-12k being played.  When I play MP3 
> files, the entire "spectrum analyser" seems to be used.
>
> Is there some sort of low-pass filter used in the Nero AAC/MPEG-4 file 
> encoder, so that I'm losing the top-end of all my songs?  I have noticed 
> that my M4A files on my iPod seem to be lacking in treble (more bass- 
> oriented) -- especially on Rush CDs, there are no real cymbal crashes.
>
> Neil
>
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