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An ABX test @ 192k

Today I detected an artifact in a 192k opus file.

The vocal sounds slightly hoarse in the 192k opus sample, especially around 10s (む-ねに, mu-neni)

Here's my ABX log.

Code: [Select]
foo_abx 2.0 report
foobar2000 v1.3.7
2015-01-30 14:09:56

File A: 03-15. I pray for you -アオイキセキ-.flac
SHA1: 1be279db71b5881d5873c19334dfc52df593c3e0
Gain adjustment: -9.23 dB
File B: I pray for you -アオイキセキ-.opus
SHA1: 4ca43dd7fc470f199d573d7c167daa9c2b04c2c9
Gain adjustment: -9.23 dB

Used DSPs:
Resampler (SoX) mod2

Output:
DS : 스피커(Envy24 Family Audio Controller WDM)
Crossfading: NO

14:09:56 : Test started.
14:10:18 : 00/01
14:10:39 : 01/02
14:11:00 : 02/03
14:11:13 : 03/04
14:11:29 : 04/05
14:12:27 : 05/06
14:12:43 : 06/07
14:12:59 : 07/08
14:13:47 : 07/09
14:14:00 : 08/10
14:14:19 : 09/11
14:15:15 : 10/12
14:15:31 : 11/13
14:15:56 : 11/14
14:16:11 : 11/15
14:16:30 : 12/16
14:16:30 : Test finished.

----------
Total: 12/16
Probability that you were guessing: 3.8%

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I was not able to distinguish 320k opus from the lossless.

An ABX test @ 192k

Reply #1
This is really interesting, my ears (and maybe my equipment) are too bad to hear it. Can you hear that with AAC (Apple lib) too?

An ABX test @ 192k

Reply #2
Test all three please not just Apple. Apple, FhG and FDK. Thanks.

An ABX test @ 192k

Reply #3
I'll test the sample with 3 AAC encoders as well (though I only use the Apple encoder when converting into AAC),
but maybe it will take a long time to report that because I've been being very busy in these days.

Best,
Joungmin

 
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