New 9.1.6 AAC encoder audio quality ?

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fmpanda
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New 9.1.6 AAC encoder audio quality ?

Post by fmpanda » Wed Nov 04, 2020 9:27 pm

I'm using two version of EZ CD Audio Converter. One is 8.3.2 and another one is 9.1.6.
I've converted 100 files from FLAC to AAC-LC VBR Q8.

I've tested both encoder and I found the new EZ CD 9.1.6 with (Fraunhofer FDK AAC library, Version: 4.0.1) has poor quality than the older EZ CD 8.3.2 which comes with (FhG FDK AAC library, Version: 4.0.0)

The newer EZ CD 9.1.6 version provides artifacts even in AAC-LC VBR Q8 but when I convert the same file with CBR 256kbps. The artifacts are gone.

There must be something wrong with EZ CD 9.1.6 AAC-LC encoder.

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poiko
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Re: New 9.1.6 AAC encoder audio quality ?

Post by poiko » Fri Nov 06, 2020 8:57 pm

Both versions 4.0.0 and 4.0.1 are mostly the same. I highly doubt FDK 4.0.1 (bug fixes) introduce new audible problems.

However, I am currently working with the new Fraunhofer FDK AAC Codec Library v4.0.1 (Update 201124) [ AAC Encoder v4.0.1, FDK Tools v3.1.0 ] retunings to provide improved audio quality. It is a time taking process, but the results are great so far.

The new FDK AAC version also has an improvement in VBR algorithm.

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Re: New 9.1.6 AAC encoder audio quality ?

Post by vladhv » Wed Nov 25, 2020 4:24 pm

Hi poiko,
Should I expect this year FDK 4.0.1 + patches + adjustments?

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Re: New 9.1.6 AAC encoder audio quality ?

Post by poiko » Thu Nov 26, 2020 8:58 am

It is almost finished. It was supposed to be released this weekend along with the updated xHE-AAC encoder. If we work hard enough next two days, it will be available next weekend or next week.

Here is some information about the new FDK AAC encoder I am going to use:

https://www.poikosoft.com/ezcd-fraunhof ... ac-encoder

The information is preliminary and there still may be minor adjustments based on listening tests of perceived audio quality.

I am still rerunning the VBR average bitrate tests and also added one more VBR Mode (HE-AAC 80 kbit/s).

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Re: New 9.1.6 AAC encoder audio quality ?

Post by vladhv » Thu Nov 26, 2020 11:34 am

Thank you very much for the answer.
We look forward to the release of EZ CD 9.2.

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Re: New 9.1.6 AAC encoder audio quality ?

Post by poiko » Thu Nov 26, 2020 3:03 pm

VBR Stereo modes now completed :D

List updated at

https://www.poikosoft.com/ezcd-fraunhof ... ac-encoder

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