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Opus 1.1-beta, Officially released
eahm
post Jul 12 2013, 20:45
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http://lists.xiph.org/pipermail/opus/2013-July/002158.html

Please can anyone compile it for Windows so I can start testing?

I may just need to learn how to at least compile.

Thanks.
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darkbyte
post Jul 27 2013, 14:32
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I've encoded my collection with the new beta at 96kbps VBR setting and i should say that i really like what i hear. I've listened to these files all week with my Beyer DT-770 and my Fiio E10 while programming and artifacts were very rare.

One of the bad quality tracks i've found was Das Boot from U96. For me it seems like a pre-echo problem on the synth percussions when they're played on the left channel only. I can't upload a sample now but i'll do it tomorrow.

What i've also noticed is that if i downmix stereo opus files into mono there's often a weird warbling introduced in the mid-high range. I think it's mostly noticeable on files with complex stereo separation and high tonal content. I know it's not a typical use case but i'm listening to music through an USB FM transmitter when i'm at my parents house and when a receiver is far away from the transmitter it falls back to Mono. I've thought that the transmitter is making the distortion but if i add a Mono downmix DSP into Foobar it yields the same problem on my headphones (FM stereo transmits mono signal by mixing L+R together for backward compatibility with old receivers and sends an L-R sideband signal for stereo reconstruction but that's only available when the signal is strong enough). Is there anything i can do to improve this or this is the price of the channel masking of Opus?

This post has been edited by darkbyte: Jul 27 2013, 14:58


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Wavpack -b450x1c
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jmvalin
post Jul 28 2013, 17:32
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QUOTE (darkbyte @ Jul 27 2013, 09:32) *
One of the bad quality tracks i've found was Das Boot from U96. For me it seems like a pre-echo problem on the synth percussions when they're played on the left channel only. I can't upload a sample now but i'll do it tomorrow.


Is this sample worse with 1.1-beta than 1.0.x or is it just one on which Opus doesn't handle well. In either case, I'm still interesting in having a look.

QUOTE (darkbyte @ Jul 27 2013, 09:32) *
What i've also noticed is that if i downmix stereo opus files into mono there's often a weird warbling introduced in the mid-high range. I think it's mostly noticeable on files with complex stereo separation and high tonal content.


If you mean that your downmixing the decoded stereo audio to mono, then it's a known issue. What happens is that Opus is able to encode intensity stereo with channels being 180 degrees out of phase. The result is that when you downmix to mono, you get partial cancellation. It's possible to hack the encoder to not have that issue, but we're also looking at the possibility of letting the decoder downmix differently to avoid the issue.

QUOTE (darkbyte @ Jul 27 2013, 09:32) *
Is there anything i can do to improve this or this is the price of the channel masking of Opus?


Actually, this has nothing to do with channel masking. Channel masking is only used for surround, not for stereo.
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Posts in this topic
- eahm   Opus 1.1-beta   Jul 12 2013, 20:45
- - NullC   QUOTE (eahm @ Jul 12 2013, 12:45) http://...   Jul 13 2013, 00:29
|- - eahm   QUOTE (NullC @ Jul 12 2013, 16:29) QUOTE ...   Jul 13 2013, 01:57
- - Anakunda   Here: I think U need Win7 or newer Don't forge...   Jul 13 2013, 00:39
|- - NullC   QUOTE (Anakunda @ Jul 12 2013, 16:39) Her...   Jul 13 2013, 01:21
- - Anakunda   What obfuscation do you mean? Check opusenc --vers...   Jul 13 2013, 01:25
|- - NullC   QUOTE (Anakunda @ Jul 12 2013, 17:25) Wha...   Jul 13 2013, 05:30
|- - Lear   QUOTE (NullC @ Jul 13 2013, 06:30) Sorry,...   Jul 13 2013, 08:47
|- - Anakunda   QUOTE (Lear @ Jul 13 2013, 09:47) They...   Jul 13 2013, 09:14
- - RobertM   I've tried out a few samples and happy to repo...   Jul 13 2013, 08:38
|- - IgorC   QUOTE (RobertM @ Jul 13 2013, 04:38) I...   Jul 14 2013, 03:33
- - zerowalker   Lovely, been waiting for Opus to update it, was so...   Jul 13 2013, 10:06
- - Gainless   Nice to see the beta finally up here. Apart from t...   Jul 13 2013, 12:15
- - alter4   That is good news actually! But what is nec...   Jul 14 2013, 11:23
|- - IgorC   QUOTE (alter4 @ Jul 14 2013, 07:23) That ...   Jul 15 2013, 17:39
|- - ChronoSphere   QUOTE (IgorC @ Jul 15 2013, 18:39) The ex...   Jul 15 2013, 19:12
|- - saratoga   QUOTE (ChronoSphere @ Jul 15 2013, 14:12)...   Jul 15 2013, 19:57
|- - eahm   QUOTE (ChronoSphere @ Jul 15 2013, 11:12)...   Jul 15 2013, 20:16
|- - saratoga   QUOTE (eahm @ Jul 15 2013, 15:16) QUOTE (...   Jul 15 2013, 20:23
- - me7   For music playback, they need native support in An...   Jul 14 2013, 14:01
- - eahm   I knew about these test but codecs improved a lot ...   Jul 15 2013, 20:44
- - ChronoSphere   QUOTE (saratoga @ Jul 15 2013, 20:57) I...   Jul 15 2013, 23:18
|- - jensend   QUOTE (ChronoSphere @ Jul 15 2013, 16:18)...   Jul 16 2013, 16:32
|- - saratoga   QUOTE (jensend @ Jul 16 2013, 11:32) QUOT...   Jul 16 2013, 18:08
|- - jensend   QUOTE (saratoga @ Jul 16 2013, 11:08) QUO...   Jul 18 2013, 07:50
|- - saratoga   QUOTE (jensend @ Jul 18 2013, 02:50) A sp...   Jul 18 2013, 18:22
|- - jensend   QUOTE (saratoga @ Jul 18 2013, 11:22) Is ...   Jul 18 2013, 22:58
- - ChronoSphere   QUOTE (jensend @ Jul 16 2013, 17:32) Also...   Jul 16 2013, 19:06
|- - saratoga   QUOTE (ChronoSphere @ Jul 16 2013, 14:06)...   Jul 16 2013, 19:30
- - ChronoSphere   I see. So the switch is there to conserve power ot...   Jul 16 2013, 19:38
- - ChronoSphere   Well, since editing is not possible, here's th...   Jul 17 2013, 12:09
- - hidn   a lot of codecs and lack of support   Jul 17 2013, 12:57
|- - greynol   QUOTE (hidn @ Jul 17 2013, 04:57) a lot o...   Jul 17 2013, 17:37
- - Dynamic   I think these improvements and the fact we have Mo...   Jul 17 2013, 17:10
- - Dynamic   I have edited the History section of the English W...   Jul 17 2013, 18:21
|- - saratoga   QUOTE (Dynamic @ Jul 17 2013, 13:21) I ha...   Jul 18 2013, 01:45
- - Dynamic   That spectrogram has been there since I started ed...   Jul 19 2013, 21:22
- - darkbyte   I've encoded my collection with the new beta a...   Jul 27 2013, 14:32
|- - jmvalin   QUOTE (darkbyte @ Jul 27 2013, 09:32) One...   Jul 28 2013, 17:32
|- - Speckmade   QUOTE (darkbyte @ Jul 29 2013, 12:31) QUO...   Aug 8 2013, 10:38
- - IgorC   There is a paper that describes how Opus (CELT par...   Jul 28 2013, 15:56
- - darkbyte   QUOTE (jmvalin @ Jul 28 2013, 18:32) Is t...   Jul 29 2013, 11:31
- - darkbyte   Uploaded the lossless and opus 1.1-beta encoded sa...   Jul 29 2013, 17:20
- - darkbyte   I'm reading the documentation IgorC linked and...   Jul 31 2013, 20:38
|- - jmvalin   QUOTE (darkbyte @ Jul 31 2013, 15:38) I...   Jul 31 2013, 22:33
|- - darkbyte   QUOTE (jmvalin @ Jul 31 2013, 23:33) Even...   Aug 7 2013, 17:48
- - Gainless   Jmvalin, while the new beta sounds in general pret...   Aug 1 2013, 22:21
|- - jmvalin   QUOTE (Gainless @ Aug 1 2013, 17:21) Jmva...   Aug 2 2013, 08:32
||- - Gainless   QUOTE (jmvalin @ Aug 2 2013, 09:32) QUOTE...   Aug 2 2013, 20:01
|- - IgorC   QUOTE (Gainless @ Aug 1 2013, 18:21) Jmva...   Aug 11 2013, 18:48
|- - Gainless   QUOTE (IgorC @ Aug 11 2013, 19:48) QUOTE ...   Aug 12 2013, 17:21
|- - jmvalin   QUOTE (Gainless @ Aug 12 2013, 12:21) Of ...   Aug 13 2013, 03:11
|- - Gainless   QUOTE (jmvalin @ Aug 13 2013, 04:11) QUOT...   Aug 13 2013, 14:39
|- - jensend   Gainless, when you press reply the editor starts o...   Aug 13 2013, 16:33
- - Gainless   Yeah, sorry, wasn't the best idea with full qu...   Aug 13 2013, 16:51
- - IgorC   Gainless, Have performed a few fast ABC/HR sessio...   Aug 14 2013, 05:54
|- - Gainless   QUOTE (IgorC @ Aug 14 2013, 06:54) Gainle...   Aug 15 2013, 21:06
|- - jmvalin   QUOTE (Gainless @ Aug 15 2013, 16:06) Tha...   Aug 15 2013, 21:11
- - eahm   meh. please delete.   Aug 14 2013, 06:10
- - Octocontrabass   I've found a sample that has unusual artifacts...   Sep 9 2013, 08:37
|- - kabal4e   QUOTE (Octocontrabass @ Sep 9 2013, 19:37...   Sep 10 2013, 00:58
||- - Octocontrabass   QUOTE (kabal4e @ Sep 9 2013, 16:58) Accor...   Sep 10 2013, 03:57
|- - jmvalin   QUOTE (Octocontrabass @ Sep 9 2013, 03:37...   Sep 10 2013, 06:20
|- - Octocontrabass   Aha, so the problem I have with this sample is tha...   Sep 10 2013, 08:02
- - qduaty   What causes fixed frame size of 20 ms to sound ...   Oct 2 2013, 14:19
- - saratoga   At 20 ms you can use all transform sizes. At 10 m...   Oct 2 2013, 16:45
|- - qduaty   QUOTE (saratoga @ Oct 2 2013, 17:45) At 2...   Oct 4 2013, 20:06
|- - jensend   If you're forcing the encoder to work within n...   Oct 4 2013, 22:02
- - IgorC   Well, 10 and 20 ms have similar quality at 128k. T...   Oct 4 2013, 23:06
- - NullC   At some sufficiently high rate I expect 10ms to be...   Oct 8 2013, 20:24
- - IgorC   I think the main drawback of variable frame size (...   Oct 12 2013, 17:04
|- - jmvalin   QUOTE (IgorC @ Oct 12 2013, 12:04) I thin...   Oct 13 2013, 03:07
|- - qduaty   QUOTE (jmvalin @ Oct 13 2013, 04:07) The ...   Oct 13 2013, 23:12
- - Nystagmus   I must say, Opus is kind of exciting with what it ...   Oct 13 2013, 16:38
- - IgorC   Have tried a last surround fork (build g6b9087a). ...   Oct 14 2013, 09:17
- - IgorC   The results for electronic music (two tracks from ...   Oct 21 2013, 03:30
- - IgorC   1.1x unnecessary increases bitrate on a dithered s...   Oct 26 2013, 14:11
- - o-l-a-v   Could anyone link me to a windows build of opus 1....   Oct 26 2013, 14:44
- - IgorC   Also have uploaded another version of a silence. T...   Oct 26 2013, 14:44
- - darkbyte   Is there a development blogs somewhere where i can...   Nov 16 2013, 14:22
|- - jensend   To add to what marc said, you can always read git ...   Nov 16 2013, 18:10
- - marc2003   you could check the mailing list or IRC. http://w...   Nov 16 2013, 16:08
- - darkbyte   Thank you guys! No i didn't expected anyth...   Nov 16 2013, 21:56
- - IgorC   iirc it's heading to RC.   Nov 17 2013, 00:08
|- - C.R.Helmrich   Reading diagonally over the commit messages, there...   Nov 17 2013, 02:30
|- - IgorC   Chris, QUOTE (C.R.Helmrich @ Nov 16 2013, 22...   Nov 17 2013, 04:12
- - IgorC   According to http://www.opus-codec.org/ 1.1 RC ...   Nov 26 2013, 16:10
- - LithosZA   Still waiting for win32 binaries   Nov 26 2013, 17:11
- - Anakunda   Opus-1.1rc generic opimized build for testing, ple...   Nov 26 2013, 18:10
- - LithosZA   QUOTE (Anakunda @ Nov 26 2013, 19:10) Opu...   Nov 26 2013, 18:43
- - Anakunda   Please redownload and try either build without AVX...   Nov 26 2013, 18:59
- - LithosZA   Hi Anakunda, I tried all of these and still get t...   Nov 26 2013, 19:12
- - eahm   Case, when you have time can you please create the...   Nov 26 2013, 19:24
- - Anakunda   LithosZA you're right, my mistake. This alread...   Nov 26 2013, 19:41
|- - eahm   Anakunda, why do I need to use all these DLLs? Whe...   Nov 26 2013, 20:12
|- - saratoga   QUOTE (eahm @ Nov 26 2013, 15:12) Anakund...   Nov 26 2013, 20:24
- - LithosZA   QUOTE (Anakunda @ Nov 26 2013, 20:41) Lit...   Nov 26 2013, 19:51
|- - jmvalin   LithosZA, are you still having that problem? If so...   Nov 27 2013, 02:50
- - IgorC   I would rather wait for an official binaries. The ...   Nov 26 2013, 21:30
- - LithosZA   Hi jmvalin, Yes, I am still having the same issue...   Nov 27 2013, 06:43
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