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very problematic lame mp3 sample, even -b 320 very easy to abx
drumliner
post May 31 2009, 08:17
Post #1





Group: Members
Posts: 80
Joined: 25-November 01
Member No.: 537



I don't know if there's still any interest in new problematic mp3 samples, but since I just found a very obvious one during a personal test of mine, I decided to post it in case someone finds it useful...

Lame 3.98.2 -V1 vs Nero AAC q0.5 (in a quick test I wasn't able to abx the aac file against the attached flac). The problem is on the loud noisy click with a fast attack 2 seconds into the sample. I guess we have smearing and preecho going on here - in any case it sounds plainly different than the original.
CODE
foo_abx 1.3.4 report
foobar2000 v0.9.6.7
2009/05/31 06:17:03

File A: X:\Welcome to Drexciya.mp4
File B: X:\Welcome to Drexciya V1.mp3

06:17:03 : Test started.
06:17:23 : 01/01  50.0%
06:17:30 : 02/02  25.0%
06:17:35 : 03/03  12.5%
06:17:41 : 04/04  6.3%
06:17:46 : 05/05  3.1%
06:17:53 : 06/06  1.6%
06:17:59 : 07/07  0.8%
06:18:05 : 08/08  0.4%
06:18:11 : 09/09  0.2%
06:18:15 : 10/10  0.1%
06:18:20 : 11/11  0.0%
06:18:25 : 12/12  0.0%
06:18:31 : 13/13  0.0%
06:18:37 : 14/14  0.0%
06:18:44 : 15/15  0.0%
06:18:49 : 16/16  0.0%
06:18:50 : Test finished.

----------
Total: 16/16 (0.0%)



Lame 3.98.2 -b 320 vs Nero AAC q0.5. Slightly better than the -V1 encoding but still extremely easy to abx as you can see from the timing of the test.
CODE
foo_abx 1.3.4 report
foobar2000 v0.9.6.7
2009/05/31 06:22:17

File A: X:\Welcome to Drexciya 320.mp3
File B: X:\Welcome to Drexciya.mp4

06:23:10 : Test started.
06:23:27 : 01/01  50.0%
06:23:32 : 02/02  25.0%
06:23:35 : 03/03  12.5%
06:23:39 : 04/04  6.3%
06:23:41 : 05/05  3.1%
06:23:45 : 06/06  1.6%
06:23:47 : 07/07  0.8%
06:23:50 : 08/08  0.4%
06:23:53 : 09/09  0.2%
06:23:56 : 10/10  0.1%
06:23:58 : 11/11  0.0%
06:24:00 : 12/12  0.0%
06:24:04 : 13/13  0.0%
06:24:06 : 14/14  0.0%
06:24:08 : 15/15  0.0%
06:24:12 : 16/16  0.0%
06:24:13 : Test finished.

----------
Total: 16/16 (0.0%)

Attached File(s)
Attached File  WelcomeToDrexciya.flac ( 316.29K ) Number of downloads: 159
 
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/mnt
post Jun 1 2009, 21:32
Post #2





Group: Members
Posts: 697
Joined: 22-April 06
Member No.: 29877



It's a major precho problem on this sample, it shares the same problem with a sample i found and the eig sample.

ABX logs:

LAME 3.98.2 V2

CODE
foo_abx 1.3.4 report
foobar2000 v0.9.6.7
2009/06/01 21:07:46

File A: C:\Downloads\WelcomeToDrexciya.flac
File B: C:\Temp\WelcomeToDrexciya v2.mp3

21:07:46 : Test started.
21:07:55 : 01/01 50.0%
21:07:58 : 02/02 25.0%
21:08:01 : 03/03 12.5%
21:08:03 : 04/04 6.3%
21:08:06 : 05/05 3.1%
21:08:11 : 06/06 1.6%
21:08:16 : 07/07 0.8%
21:08:19 : 08/08 0.4%
21:08:26 : 09/09 0.2%
21:08:32 : 10/10 0.1%
21:08:33 : Test finished.

----------
Total: 10/10 (0.1%)


A clicking precho artifact at around 0:02.

LAME 3.98.2 V0

CODE
foo_abx 1.3.4 report
foobar2000 v0.9.6.7
2009/06/01 21:08:45

File A: C:\Downloads\WelcomeToDrexciya.flac
File B: C:\Temp\WelcomeToDrexciya V0.mp3

21:08:45 : Test started.
21:08:55 : 01/01 50.0%
21:09:03 : 02/02 25.0%
21:09:09 : 03/03 12.5%
21:09:13 : 04/04 6.3%
21:09:17 : 05/05 3.1%
21:09:22 : 06/06 1.6%
21:09:26 : 07/07 0.8%
21:09:30 : 08/08 0.4%
21:09:34 : 09/09 0.2%
21:09:38 : 10/10 0.1%
21:09:42 : 11/11 0.0%
21:09:47 : 12/12 0.0%
21:09:52 : 13/13 0.0%
21:09:56 : 14/14 0.0%
21:10:00 : 15/15 0.0%
21:10:04 : 16/16 0.0%
21:10:06 : Test finished.

----------
Total: 16/16 (0.0%)


Sounds worse then the V2 encode huh.gif.

LAME 3.98.2 320 CBR

CODE
foo_abx 1.3.4 report
foobar2000 v0.9.6.7
2009/06/01 21:10:29

File A: C:\Downloads\WelcomeToDrexciya.flac
File B: C:\Temp\WelcomeToDrexciya -b 320.mp3

21:10:29 : Test started.
21:10:38 : 01/01 50.0%
21:10:42 : 02/02 25.0%
21:10:46 : 03/03 12.5%
21:10:49 : 04/04 6.3%
21:10:52 : 05/05 3.1%
21:10:56 : 06/06 1.6%
21:11:01 : 07/07 0.8%
21:11:05 : 08/08 0.4%
21:11:08 : 09/09 0.2%
21:11:17 : 10/10 0.1%
21:11:21 : 11/11 0.0%
21:11:25 : 12/12 0.0%
21:11:26 : Test finished.

----------
Total: 12/12 (0.0%)


If it sounds really bad at V2, its gonna be ABXable at 320 most of the time wink.gif. IMO its not gonna be transparent with other Mp3 encoders though.

Nero AAC 1.3.3.0 -q 0.55

CODE
foo_abx 1.3.4 report
foobar2000 v0.9.6.7
2009/06/01 21:11:49

File A: C:\Downloads\WelcomeToDrexciya.flac
File B: C:\Temp\WelcomeToDrexciya.m4a

21:11:49 : Test started.
21:11:58 : 01/01 50.0%
21:12:03 : 02/02 25.0%
21:12:16 : 03/03 12.5%
21:12:20 : 04/04 6.3%
21:12:25 : 05/05 3.1%
21:12:30 : 06/06 1.6%
21:12:34 : 07/07 0.8%
21:12:51 : 07/08 3.5%
21:12:57 : 08/09 2.0%
21:13:02 : 09/10 1.1%
21:13:14 : 10/11 0.6%
21:13:23 : 10/12 1.9%
21:13:27 : 11/13 1.1%
21:13:32 : 12/14 0.6%
21:13:37 : 13/15 0.4%
21:13:40 : 14/16 0.2%
21:13:47 : 14/17 0.6%
21:13:50 : 14/18 1.5%
21:13:53 : 15/19 1.0%
21:13:57 : 16/20 0.6%
21:14:11 : 17/21 0.4%
21:14:18 : 18/22 0.2%
21:14:26 : 18/23 0.5%
21:14:29 : 18/24 1.1%
21:14:32 : Test finished.

----------
Total: 18/24 (1.1%)


Hard to ABX at -q 0.55, but just almost transparent. A big improvement from V2 and 320 CBR though and at a smaller size.

This post has been edited by /mnt: Jun 1 2009, 21:36


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krabapple
post Jun 2 2009, 00:54
Post #3





Group: Members
Posts: 2274
Joined: 18-December 03
Member No.: 10538



took me awhile but I got the hang of it, focusing on the leading edge of that first click, and then it was not too hard at the setting I used (192 VBR)
Which makes sense if you guys are ABXing it at 320!



Codec Profile : MP3 VBR V2
Encoding : lossy
Tool : LAME3.98b


CODE
foo_abx 1.3.3 report
foobar2000 v0.9.6.1
2009/06/01 19:46:40

File A: C:\Documents and Settings\Steven\Desktop\WelcomeToDrexciya.flac
File B: C:\Documents and Settings\Steven\Desktop\_ - WelcomeToDrexciya.mp3

19:46:40 : Test started.
19:48:37 : 01/01 50.0%
19:48:51 : 01/02 75.0%
19:49:02 : 02/03 50.0%
19:49:22 : 02/04 68.8%
19:49:29 : 03/05 50.0%
19:49:34 : 04/06 34.4%
19:49:41 : 05/07 22.7%
19:49:57 : 05/08 36.3%
19:50:00 : 06/09 25.4%
19:50:06 : 06/10 37.7%
19:50:12 : 07/11 27.4%
19:50:15 : 08/12 19.4%
19:50:25 : 09/13 13.3%
19:50:28 : 10/14 9.0%
19:50:36 : 11/15 5.9%
19:50:45 : 12/16 3.8%
19:50:57 : 13/17 2.5%
19:51:00 : 14/18 1.5%
19:51:14 : 15/19 1.0%
19:51:24 : 16/20 0.6%
19:51:28 : 17/21 0.4%
19:51:43 : 18/22 0.2%
19:51:52 : 18/23 0.5%
19:51:58 : 19/24 0.3%
19:52:01 : 20/25 0.2%
19:52:04 : 21/26 0.1%
19:52:09 : 22/27 0.1%
19:52:27 : 23/28 0.0%
19:52:33 : 24/29 0.0%
19:52:40 : 25/30 0.0%
19:52:51 : 26/31 0.0%
19:52:59 : 27/32 0.0%
19:53:03 : 28/33 0.0%
19:53:06 : 29/34 0.0%
19:53:10 : 30/35 0.0%
19:53:14 : Test finished.

----------
Total: 30/35 (0.0%)


This post has been edited by krabapple: Jun 2 2009, 00:55
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