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Problematic sample for Nero6 AAC

These are the first 15 seconds of "In your Eyes" by Peter Gabriel

I was trying the aac encoder in nero 6.0.0.11 at normal - high quality, encoder quality high, lc profile.

The bitrate of the mp4 is about 125 kbps.

At the second 2 there are many easily discernible artifacts in the cymbals (sound is watery).

I did a fast abx, here are the results:

Code: [Select]
WinABX v0.4 test report
08/22/2003 17:20:34

A file: E:\tmp\in_your_eyes.wav
B file: E:\tmp\in_your_eyes_nero6.wav

17:21:42    1/1  p=50.0%
17:21:59    2/2  p=25.0%
17:22:16    3/3  p=12.5%
17:22:24    4/4  p=6.2%
17:22:37    5/5  p=3.1%
17:22:54    6/6  p=1.6%
17:23:19    7/7  p=0.8%
17:23:37    8/8  p=0.4%
17:24:33    9/9  p=0.2%
17:24:53  10/10  p< 0.1%
17:25:16  11/11  p< 0.1%
17:25:24  12/12  p< 0.1%
17:26:50  13/13  p< 0.1%
17:27:04  14/14  p< 0.1%
17:27:18  15/15  p< 0.1%


I've tried, as a quick (and thus not 100% accurate) comparison, also qt6 at 128 cbr (not abxed yet), but doesn't have this problem.

Can someone confirm?

Thanks & bye
Vital papers will demonstrate their vitality by spontaneously moving from where you left them to where you can't find them.

Problematic sample for Nero6 AAC

Reply #1
Thanks

Yeah, bit rate is unusually low (121 kbps here) for the clip - I will investigate this sample.

Problematic sample for Nero6 AAC

Reply #2
I did some further testing.
At "extreme" preset problem seems to be gone, i can't abx.

Tried also aacenc 2.15 (i'm curious ): at -normal preset there are the same artifacts, stronger.

Hope it helps

Bye
Vital papers will demonstrate their vitality by spontaneously moving from where you left them to where you can't find them.

 
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