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4th February 2022, 03:48 | #81 | Link |
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Surround EX?
The option to enable the surround EX mode is available for ac3 and eac3, in Adobe Audition (2017), whether the source is 5.1, 6.1 or 7.1 and whether the output of eac3 is 5.1, 6.1 or 7.1. So... what is the EX accomplishing, especially when the source is 5.1?
Last edited by FuzzyNutz; 4th February 2022 at 04:55. |
4th February 2022, 10:06 | #84 | Link | ||
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From the manual:
Quote:
Code:
Table D2.7 Dolby Surround EX Mode dsurexmod Indication --------- ----------------------------- '00' Not indicated '01' Not Dolby Surround EX encoded '10' Dolby Surround EX encoded '11' Reserved Quote:
Of course the source must be encoded previously like Dolby Digital EX, the AC3/EAC3 encoder can't do that job. Here (7.1) is useless and with 5.1 only if the source was previously a Dolby Digital EX.
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BeHappy, AviSynth audio transcoder. Last edited by tebasuna51; 4th February 2022 at 10:19. |
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4th February 2022, 21:32 | #85 | Link | |
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Ex?
Quote:
If the encoder doesn't require a source with more than 5.1 channels for EX to be enabled and subsequently, the creation of a back center by an A/V receiver, why not enable the EX flag for all AC3/EAC3 5.1 encodes? Last edited by FuzzyNutz; 4th February 2022 at 21:46. |
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5th February 2022, 01:28 | #86 | Link | |
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Quote:
After decode the AC3/EAC3 to 5.1, if the receiver (6.1 at least) read the EX flag and have a Dolby Ex decoder the Bs channel is recovered. https://en.wikipedia.org/wiki/Dolby_...lby_Digital_EX
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5th February 2022, 12:41 | #87 | Link |
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DD-EX Encoding?
hi tebasuna51
Is it possible to make DD-EX audio from lossless 7.1 audio? There is no guide for this unfortunately. If you have information on this subject, I would appreciate it if you could please explain it with an illustrated guide. thank you very much for all your efforts Adobe Audition Thank you very much for the guide. |
5th February 2022, 13:19 | #88 | Link |
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Just some info about the 3/4 (L R C LFE Ls Rs Vhl Vhr) EAC3 encode mode.
I have a minimal '3D' Surround audio system with speakers like the image1 attached. The receiver (7.1) is configured like a 3front/2surround/2top.lfe When play a EAC3 encoded like (L R C LFE Ls Rs Vhl Vhr) I can listen the Vhl Vhr channels with my FDL,FDR speakers. To encode, with Audition 2017, a WAV/W64 file 2/2/2.1 (FL FR FC LFE SL SL TFL TFR, mask channel 0x560F=22031) to EAC3 (L R C LFE Ls Rs Vhl Vhr) we don't need remap the source. But when play a standard 7.1 (L R C LFE Ls Rs Rls Rrs) I listen the channels Ls,Rls by the speaker SL and Rs,Rrs by speaker SR, and the FDL,FDR speakers are mute, like is the correct behaviour, and enough for me for a 2D surround. To make test over (L R C LFE Ls Rs Rls Rrs) I need deceive the receiver and configure the system like image2 to listen Rls,Rrs with my FDL,FDR speakers. Then the (L R C LFE Ls Rs Vhl Vhr) mode can be used instead Atmos/DTS:X for a basic 3D (enough for me) surround system (3/2/2.1)
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BeHappy, AviSynth audio transcoder. Last edited by tebasuna51; 7th February 2022 at 12:17. Reason: add info |
5th February 2022, 13:45 | #89 | Link |
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It is possible but I don't know for what.
Only 6.1 audio systems can obtain a little less size recoding a 5.1 EX instead a pure 6.1. It is not recommended. For 5.1 systems I recommend the standard downmix already explained. After that downmix to 5.1 you can encode it like EX if you want, but is usseless for 2D surround: - In a 5.1 system you listen the common parts in SL,SR channels like a phantom BS channel. - In a 6.1 system the common parts in SL,SR channels are extracted and sended to BS speaker. - In a 7.1 system the common parts in SL,SR channels are extracted and half volume are sended to BL,BR speakers. You listen the same in all systems, with or without encode like EX.
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BeHappy, AviSynth audio transcoder. Last edited by tebasuna51; 5th February 2022 at 14:06. |
6th February 2022, 05:22 | #90 | Link |
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Just to add on what tebasuna51 said, let's say you have a 51EX track.
Q: How do you know it was made from a genuine 61/71 source? A: you can't, unless a proper 61/71 release was made. It's possible to flag a traditional 51 source, or a real 61 source, as EX. You may or may not get a discrete sounding BC when you decode. It could be coincidental, or good mixing, you can't be sure. As for encoding 51EX from 71, the actual gain could vary a lot since it's possible to make audio which conflicts or makes the EX encoding useless. Any down-matrixing loses information, so it's suggested to retain the original channel count. It's also possible to have 71 audio which is 51 downmix incompatible (eg, original BD of The Lion King). |
5th March 2022, 04:12 | #92 | Link |
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Yes, the problem is not when Audition read the input file (tested ok with wav, w64 and flac) but when the encoder fail to remap the channels to the internal eac3 channel order.
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6th March 2022, 10:25 | #94 | Link | |
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Yes, from https://xiph.org/flac/format.html#format_overview
Quote:
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8th April 2022, 14:02 | #95 | Link |
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I finally put my hands on TotalCode Studio, that I can admit produces very nice quality Dolby Digital Plus files but it's really slow.
I have two questions for the "audio specialists" here. Unfortunately it's really picky about the audio format it can ingest and doesn't support something as THD at all or DTS when not in a "commercial" container, so the only idea I had for now was to use ffmpeg and convert THD and DTS to WAV(s) with the command line ffmpeg.exe" -i "input.thd" -rf64 auto "output.wav" but thus I lose both metadata and channel order. TotalCode has 2 configuration panels: Do you have any hint to correctly use it with the various audio streams that I can encounter?
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8th April 2022, 17:30 | #98 | Link | |
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Atmos metadata of course is losed but the channel order is correctly stored in ChannelMask of WAVE_FORMAT_EXTENSIBLE header of WAV/W64/RF64 (FL FR FC LF BL BR SL SR) for 7.1
If the encoder of TotalCode Studio can't read the ChannelMask of input files, like seems do the encoder of Adobe Audition you must use the same remap with eac3to or ffmpeg Quote:
Simplified and in the wav order: Code:
MediaInfo WAV EAC3 DTS --------- --- --- --- Front Left L FL L L Front Right R FR R R Front Center C FC C C Low-frequency Effects LFE LFE LFE LFE Rear Left Surround Lb BL Lrs Lsr Rear Right Surround Rb BR Rrs Rsr Front Left Center Lc FLC Lc Lc Front Right Center Rc FRC Rc Rc Back Centre Cb BC Cs Cs Surround Left Ls SL Ls Ls Surround Right Rs SR Rs Rs Top Centre Tc TC Ts Oh Top Front Left Tfl TFL Vhl Lh Top Front Centre Tfc TFC Vhc Ch Top Front Right Tfr TFR Vhr Rh Top Back Left Tbl TBL Lhr Top Back Centre Tbc TBC Chr Top Back Right Tbr TBR Rhr
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BeHappy, AviSynth audio transcoder. Last edited by tebasuna51; 8th April 2022 at 21:07. Reason: add dts |
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8th April 2022, 19:05 | #100 | Link | |
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Quote:
Can you please complete the table with THD, DTS and PCM up to 7.1? And the most important question: does FFMPEG honor that order when decoding to WAV?
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@turment on Telegram Last edited by tormento; 8th April 2022 at 19:09. |
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