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Opus 1.1 alpha version (not BABYEATER), [split from the good old megathread]
IgorC
post Feb 10 2013, 02:00
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If somebody hasn't seen there is an official Opus 1.1 alpha.

https://ftp.mozilla.org/pub/mozilla.org/opu...alpha-win32.zip

Also some kinda settings to play with
https://wiki.xiph.org/Opus_tuning
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softrunner
post Apr 7 2013, 23:11
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As I wrote before, Opus 1.1 alpha has some bugs, though version 1.0.2 is not perfect also. Check these samples. Some examples:

For 1.1 alpha at some frequencies the signal just disappears, while for both versions a lot of loud artefacts are present. Of course, all this is audible, I posted 408 Opus samples at the link above (someone needs ABX logs?).
Another problem: Opus increases bitrate even if there is no progress in quality, while Vorbis on q10 has 20 kbps, and it is perfectly OK on 15 kbps.
What I want to know is whether these artefacts can be removed in future versions, or they are the part of Opus algorithm? For example, Musepack also failed on this samples, though it is developed for many years...
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saratoga
post Apr 7 2013, 23:15
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QUOTE (softrunner @ Apr 7 2013, 17:11) *
What I want to know is whether these artefacts can be removed in future versions, or they are the part of Opus algorithm? For example, Musepack also failed on this samples, though it is developed for many years...


Sure, representing stuff like this is doable in an MDCT codec like vorbis or opus. But samples like this aren't music, so its probably not something encoders are made to deal with.
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Posts in this topic
- IgorC   Opus 1.1 alpha version (not BABYEATER)   Feb 10 2013, 02:00
- - Seren   QUOTE (IgorC @ Feb 10 2013, 09:00) If som...   Feb 10 2013, 10:53
- - moosehunter   I compiled opus-tools with libopus 1.1-alpha using...   Feb 13 2013, 04:54
- - LithosZA   QUOTE I compiled opus-tools with libopus 1.1-alpha...   Feb 13 2013, 06:39
- - Jplus   Since eig is known to be a hard sample it shouldn...   Feb 13 2013, 10:05
- - Banned   And what are these graphs supposed to show? Why do...   Feb 14 2013, 07:19
|- - softrunner   QUOTE (Banned @ Feb 14 2013, 10:19) And w...   Feb 14 2013, 09:15
|- - saratoga   QUOTE (softrunner @ Feb 14 2013, 03:15) Q...   Feb 14 2013, 20:16
|- - db1989   QUOTE (saratoga @ Feb 14 2013, 19:16) QUO...   Feb 14 2013, 20:25
- - jensend   Plenty of people ready to ream the guy with knee-j...   Feb 15 2013, 00:02
|- - db1989   QUOTE (jensend @ Feb 14 2013, 23:02) Plen...   Feb 15 2013, 16:39
- - softrunner   QUOTE (saratoga @ Feb 14 2013, 23:16) Spe...   Feb 16 2013, 02:11
|- - db1989   QUOTE (softrunner @ Feb 16 2013, 01:11) D...   Feb 16 2013, 03:48
- - IgorC   After performing some blind tests on Opus 1.1a and...   Feb 23 2013, 19:12
- - CoRoNe   Although I'm no expert in detecting audible di...   Feb 23 2013, 23:06
- - CoRoNe   I didn't think my post would fit in either of ...   Feb 23 2013, 23:51
- - IgorC   A single result for sample http://www.rarewares.or...   Mar 14 2013, 03:14
|- - jmvalin   QUOTE (IgorC @ Mar 13 2013, 22:14) A sing...   Mar 14 2013, 21:41
- - mzso   Is it normal to get weird gap/crackly artifacts at...   Mar 14 2013, 20:32
|- - IgorC   QUOTE (mzso @ Mar 14 2013, 16:32) Is it n...   Mar 15 2013, 03:59
|- - mzso   QUOTE (IgorC @ Mar 15 2013, 04:59) QUOTE ...   Mar 15 2013, 09:45
- - IgorC   The noise is constant during the whole tonal part ...   Mar 15 2013, 03:37
|- - jmvalin   QUOTE (IgorC @ Mar 14 2013, 22:37) The no...   Mar 16 2013, 00:37
- - IgorC   OK. And yes, You're right. This isn't a ...   Mar 16 2013, 02:28
|- - jmvalin   QUOTE (IgorC @ Mar 15 2013, 21:28) Also t...   Mar 16 2013, 02:50
- - IgorC   It behaves exactly the same. Both beginnings have ...   Mar 16 2013, 03:05
|- - jmvalin   QUOTE (IgorC @ Mar 15 2013, 22:05) It beh...   Mar 16 2013, 03:35
- - IgorC   No hurry at all. If it will be improved at some po...   Mar 16 2013, 03:56
- - darkbyte   I wonder if there's any new builds we can try....   Apr 1 2013, 18:10
|- - lithoc   QUOTE (darkbyte @ Apr 2 2013, 01:10) I wo...   Apr 2 2013, 06:33
- - eahm   Every codec knows how to trick our earing, don...   Apr 2 2013, 06:42
- - wswartzendruber   I'm sitting here telling myself that Google Mu...   Apr 6 2013, 03:46
- - Mach-X   Coffee. Oh and as long as Starbucks coffee exists,...   Apr 6 2013, 04:20
- - softrunner   As I wrote before, Opus 1.1 alpha has some bugs, t...   Apr 7 2013, 23:11
|- - saratoga   QUOTE (softrunner @ Apr 7 2013, 17:11) Wh...   Apr 7 2013, 23:15
|- - jmvalin   QUOTE (softrunner @ Apr 7 2013, 18:11) Fo...   Apr 8 2013, 03:01
- - softrunner   QUOTE (saratoga @ Apr 8 2013, 02:15) Sure...   Apr 7 2013, 23:19
|- - saratoga   QUOTE (softrunner @ Apr 7 2013, 17:19) QU...   Apr 8 2013, 00:35
- - Gainless   Ok, so here's another ABXable issue with tonal...   Apr 8 2013, 20:36
- - Gainless   I've played a bit around with different frames...   May 6 2013, 17:13


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