Hydrogenaudio Forums > new problem sample for WavPack lossy

Full Version: new problem sample for WavPack lossy

Hydrogenaudio Forums > Lossless Audio Compression > WavPack

guruboolez

Sep 22 2007, 14:46

I've just found this new sample while listening to early electronic music:
http://rapidshare.com/files/57539262/touch.zip.html

Successful ABX without problems on latest wavpack lossy set with -b350x4 --dns (8/8).
Successful ABX (much more subtle) with bitrate set to 400 kbps (-400x4 --dns) (15/16)
Audible problem: noise

CODE

foo_abx 1.3.1 report
foobar2000 v0.9.4.4
2007/09/22 22:26:55

File A: D:\new samples library\Morton Subotnick - Touch & Jacobs Room [7min48].flac
File B: D:\new samples library\Morton Subotnick - Touch & Jacobs Room [7min48].lossy.wv

26:55 : Test started.
27:55 : 01/01  50.0%
28:02 : 02/02  25.0%
28:10 : 03/03  12.5%
28:21 : 03/04  31.3%
28:28 : 04/05  18.8%
28:41 : 05/06  10.9%
28:46 : 06/07  6.3%
28:51 : 07/08  3.5%
28:56 : 08/09  2.0%
29:02 : 09/10  1.1%
29:05 : 10/11  0.6%
29:08 : 11/12  0.3%
29:18 : 12/13  0.2%
29:23 : 13/14  0.1%
29:29 : 14/15  0.0%
29:58 : 15/16  0.0%
29:59 : Test finished.

 ---------- 
Total: 15/16 (0.0%)

EDIT: the tested range was 12.000 - 15.000

___
for fun: a sample illustrating how important the benefit of --dns could be (lossless & encoded files in the archive: open and listen):
http://rapidshare.com/files/57540826/touch2.zip.html

guruboolez

Sep 22 2007, 15:32

Another one, less impressive, ABXed again at 400 kbps (but this time at higher listening playback):
http://rapidshare.com/files/57549399/Apples.zip.html

CODE

foo_abx 1.3.1 report
foobar2000 v0.9.4.4
2007/09/22 23:23:45

File A: D:\new samples library\Apples.wv
File B: D:\new samples library\Apples.400x4.dns.wv

23:23:45 : Test started.
23:23:56 : 01/01  50.0%
23:24:06 : 02/02  25.0%
23:24:33 : 03/03  12.5%
23:24:38 : 04/04  6.3%
23:24:41 : 05/05  3.1%
23:24:48 : 06/06  1.6%
23:24:54 : 07/07  0.8%
23:25:02 : 08/08  0.4%
23:25:06 : 09/09  0.2%
23:25:10 : 10/10  0.1%
23:25:14 : 11/11  0.0%
23:25:25 : 12/12  0.0%
23:25:27 : Test finished.

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

note: same commandline than before: -b400x4 --dns
note2: also ABXed at 320, 350 & 380 kbps: noise starts to become subtle at 380 kbps.
note3: at 250 kbps (-b250x4) the --dns switch seems to decreases the quality

shadowking

Sep 22 2007, 20:51

Touch is also a serious problem for Dualstream. In that case the VBR drops the bitrate and worse than wavpack --dns. I abxed 8/8 on Q1, Q2 very easy and 8/8 on Q3 - a little better but not hard. I tested ABR 320 k with much better results. I think with normal listening 350 k would be fine for me but track gain could make these cases noticeable.

bryant

Sep 23 2007, 23:51

Haha, That touch2 sample is great! The nodns sounds pretty much like the dns version, except for that added helicopter!

Yeah, those samples are pretty difficult. Going to -hh helps on apples, and just going to -h or -x5 helps on touch. Of course, 512 kbps fixes them too...

I think that these will make great samples for the lossyFLAC concept when applied to WavPack. I think the bitrate will still be at least 400 kbps, but the quality should not be affected by the settings and hopefully easier (i.e., loud and noisy) samples will use lower bitrates.

Thanks for your interest and the samples!

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