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7th August 2011, 18:43 | #361 | Link | ||
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BTW I cannot download the latest build from SourceForge ATM. Something is wrong with the links, it sends me into a loop. Cheers manolito |
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7th August 2011, 20:31 | #362 | Link | ||
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And even that mirror doesn't seems to work, it just redirects to the "Files" page. Anyway, you can use Auto-Update for now...
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7th August 2011, 21:38 | #363 | Link | |
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Luckily the correct values for different downmix scenarios have already been established... Tebasuna and Selur seem to be the guys to talk to. Here is a link to a corresponding thread: http://forum.doom9.org/showthread.ph...94#post1362794 For stereo downmix this post is the one to look at: http://forum.doom9.org/showthread.ph...96#post1363496 Hope this helps... Cheers manolito |
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7th August 2011, 23:02 | #364 | Link |
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I can't really follow these posts, but I tweaked the channels weights for the downmix filter some more:
https://github.com/lordmulder/LameXP...er_Downmix.cpp Basic idea: If we first create a Stereo downmix and later downmix further to Mono from there, then Center and LFE should have the same volume as Left/Right in the final mix. This means that the Center and LFE channels have to be reduced to 50% (compared to the Left/Right main channels) in the Stereo mix, because Center and LFE are mixed into both, the Left and the Right output channels. So the reduction to 50% will avoid the bias towards Center/LFE in the downmix. Moreover the Back (Surround) channels will also be reduced compared to the main channels. Sample attached.
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7th August 2011, 23:31 | #365 | Link |
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According to Selur's post the sox remix values for stereo downmix of a 6ch source should be:
1v0.3694+3v0.2612+4v0.3694 2v0.3694+3v0.2612+5v0.3694 Note that only channels 1,3,4 are used for the left channel, 2,3,5 for the right channel. Your channel assignment for a 6ch source is 1,3,4,5 and 2,3,4,6 which is somewhat different... Anyways, your stereo mix sounds pretty good. Cheers manolito |
7th August 2011, 23:51 | #366 | Link | |
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Otherwise he would be mixing "LFE" into the Left channel only, mixing "Back Left" into the Right channel only and not using "Back Right" at all - which wouldn't make much sense Instead I assume he is mixing "Back Left" into Left, "Back Right" into Right and leaving out the LFE channel completely. Except for the LFE and the different weights (it seems he is using the same weight for "main" and "back" plus some bias to the "center"), that is identical to my choice.
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8th August 2011, 02:09 | #367 | Link |
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Latest Beta on http://sourceforge.net/projects/lame...29/2011-08-07/ is BROKEN. When I click to download files, nothing happened, just redirects me on other page...please fix it or give us others links.
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8th August 2011, 02:17 | #368 | Link | |
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http://forum.doom9.org/showpost.php?...&postcount=362 There are more reports of problems with the SourceForge file release system: http://sourceforge.net/apps/trac/sou...e/ticket/21078
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8th August 2011, 02:17 | #369 | Link | |
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This is old news...
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Cheers manolito //Edit Oops. MuldeR was faster than me... |
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8th August 2011, 12:28 | #370 | Link | |
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Works for me: http://sourceforge.net/projects/lame...8.exe/download
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8th August 2011, 21:13 | #371 | Link | |
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LameXP v4.03 Alpha-10:
Quote:
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9th August 2011, 04:16 | #373 | Link |
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Some more thoughts about downmixing:
http://ac3filter.net/wiki/Mixing_matrix According to this the downmix volumes should be "normalized" to avoid clipping. http://www.surroundassociates.com/tapeprep.html http://www.ocularstudio.com/why-surr...ereo-or-quadro According to these two links channel assignment for DTS is often different. What do we do when downmixing DTS sources? Valdec decodes DTS in LameXP, does it reassign the channels to the "standard" assignment? Cheers manolito |
9th August 2011, 11:41 | #374 | Link | ||
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So in sum the volume cannot exceed 1.0, which prevents clipping. When using "custom" weights you have to take care that the sum of all weights (per channel) is 1.0 or below. Otherwise clipping is possible. Of course I tried to choose weights that exactly match 1.0 in sum Quote:
As said before, LameXP now assumes the "Default Channel Ordering" for multiple channel WAVE files. I think any decoder which outputs WAVE files is supposed to use that channel mapping... (In theory different channel mappings could be used/assumed, depending on the individual input format or decoder of the current file. But at the moment the "dowmix" filter doesn't know about input formats. And, in a well-designed system, it shouldn't have to!)
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15th August 2011, 22:15 | #375 | Link | |
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LameXP v4.03 Alpha-12:
Quote:
http://mulder.googlecode.com/svn/tru...Lib/README.txt (And yes, I am well aware that the EncodeDecodePointer substitute function does not provide the extra "protection" of the original implementation)
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19th August 2011, 15:55 | #376 | Link |
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LameXP v4.03 Alpha-13:
This version adds experimental support for the FHG AAC Encoder that is included with latest Winamp. You will need the Add-in to enable the FHG AAC Encoder in LameXP. See the included instructions!
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19th August 2011, 22:15 | #378 | Link |
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I will leave that decision up to the users. Haven't done any comprehensive tests yet.
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21st August 2011, 14:54 | #379 | Link | |
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LameXP v4.03 Alpha-14:
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22nd August 2011, 11:21 | #380 | Link | |
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http://www.hydrogenaudio.org/forums/...dpost&p=763079 And in your FAQ you provide a direct link to a version of Winamp which is the German only version. You may want to link either to the English version and/or to the international version which includes German, Dutch, French, Italian, Polish, Russian, Spanish, Swedish, Korean, Japanese, Chinese, Turkish, Portuguese and Romanian languages. Just my two cents |
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aac, aotuv, flac, lame, lamexp, mp3, mp4, ogg, oggenc, opus, vorbis |
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