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21st November 2015, 20:23 | #1 | Link |
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Convert 3/1 (4.0) to 3/2 (5.0)
What's the best way to convert 3/1 (4.0) to 3/2 (5.0)? Because a lot of players still mess up 3/1 and play it as 2/2, I want all my 3/1(4.0) stuff to be 3/2(5.0)
I know the start is: -decode DTS-MA/PCM 4.0 to wavs -make a copy of the rear channel, label them BL and BR. then what? |
21st November 2015, 21:05 | #2 | Link |
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Then you will have to encode some compressed audio format again from the per-channel WAVs. You may not easily purchase any dts encoder, but as a free AC3 encoder, you can use Aften and different GUIs supporting it, like EncWAVtoAC3, it has a multiplex interface where you can select channel WAVs and build a call for Aften with MUX file (AFAIR, long ago...).
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21st November 2015, 21:37 | #3 | Link |
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Instead copy BC and create BL and BR with the same volume you must atenuate the volume to preserve the global balance.
eac3to BC.wav BL.wav -3dB eac3to BC.wav BR.wav -3dB
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22nd November 2015, 14:00 | #4 | Link |
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would you also have to attenuate channels if you transform a mono 1.0 track into a mono 2.0 track by simply copying the center channel and making L, R out of it?
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22nd November 2015, 19:27 | #5 | Link | |
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Quote:
In 3/1 to 3/2 you duplicate the rear volume, maintaining the front volume, if not attenuate.
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23rd November 2015, 17:48 | #8 | Link | |
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The question is emulate the source, not create new effects.
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23rd November 2015, 18:17 | #9 | Link |
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After creating BL & BR from your (original) surround channel, you only need to attenuate both BL & BR by 3.103dB. If you choose to not apply attenuation, your new surround channels will be 3.103dB louder compared to the original.
Last edited by AlexKane; 23rd November 2015 at 18:25. Reason: cosmetic surgery |
24th November 2015, 10:29 | #11 | Link | ||
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Quote:
Well, for that exist the rule: Quote:
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25th November 2015, 14:24 | #15 | Link |
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We can discuss about a topic, puting the arguments, and the users can choice the best for each one.
I am a moderator but I do not want impose my arguments, I want convince. And I not need remove any answer if are technical arguments without personal offenses. - Now my arguments about: BL = 0.707 * BC BR = 0.707 * BC (0.707 = -3.01dB) When we listen the same sound in BL and BR speakers our brain listen a phantom channel at the middle position. Just the position of the BC speaker. The acustic power is proportional to the square value of volume, and added the two channels: (0.707*BC)^2 + (0.707*BC)^2 = BC^2 The same than provided by the original BC channel. Then with a 3/2.0 system we listen the same than we have a 3/1 system, like original source was. - Now some arguments for what I don't like your method: BL = BC - k*FR BR = BC - k*FL where k is a constant (for example -12 ... -24dB). 1) The acustic power is always big than original sound 2) Maybe this mix enforce the surround effect with some, not always for all, music sound. But here we speak about sound tracks from movies and we can obtain undesired effects. When a actor are at the left side of the screen many dialog volume go to FL speaker. For what we need listen this dialog (added or substracted) from the BR speaker?
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25th November 2015, 20:38 | #16 | Link | |
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Quote:
I've tried to find Dolby recommendation how to perform mixing for OP problem but can't find anything useful. From my perspective separating Rear Surround by partially removing energy from Front speaker may improve channel separation - that's all. |
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10th March 2016, 03:35 | #17 | Link | |
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Quote:
What software will make the 3/2 layout audio I'm desiring? |
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10th March 2016, 11:01 | #18 | Link | ||
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When you have the 5 channels: FL.wav, FR.wav, FC.wav, BL.wav and BR.wav you can convert them to:
Lossless flac: Quote:
Quote:
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