Nero AAC, listening test :-) Options

[Ivan Dimkovic]

Hi, - before releasing final version I would like to hear audiophiles opinion about two noise allocation strategies we can use.

These two versions will be called "build_a" and "build_b"

I've packed some of the essential "codec killers" samples in build_a.zip and build_b.zip - originals could be easily found on hydrogenaduio and mp3dev

http://www.psytel-research.co.yu/test/

BUILD A:

http://www.psytel-research.co.yu/test/build_a.zip


BUILD B:

http://www.psytel-research.co.yu/test/build_b.zip


Which one is better, and for which samples?

Files are CBR - 80, 96 and 128 kbps - 32 and 44.1 kHz sampling rate - ADIF AAC format

This post has been edited by Ivan Dimkovic: Nov 27 2002, 13:21

[ff123]

roberto,

I got your file.

I verified that when I loaded up the five samples, and then added the original as the 6th sample, it worked (or rather it didn't work) just like you said.

Then I made all of the samples the original, and that worked properly. I think I remember that I check the WAV properties of each file prior to each test. That is, I need to know which file will end last, so that I can play this file all the way to the end instead of cutting it off short.

The bottom line is that this behavior is still caused by an WAV file that is different somehow from the typical WAV file.

I opened atrain_1.wav in Cool Edit, and then saved it as a new WAV file, atrain_1a.wav. The old file causes problems, but the new one doesn't. A binary file comparison (using the DOS command "fc") yields the following differences:

Comparing files ATrain_1.wav and ATRAIN_1A.WAV
0000001C: 90 10
0000001D: C0 B1
0000001E: CD 02

I'll look this up to see what the difference is.

ff123