"Mixdown" DTS 2.0 to Dolby Surround

General questions or discussion about HandBrake, Video and/or audio transcoding, trends etc.
Post Reply
bip
Posts: 2
Joined: Mon Jul 22, 2019 11:17 am

"Mixdown" DTS 2.0 to Dolby Surround

Post by bip »

Description of problem or question:
I have a source with a DTS 2.0 audio track. With HandBrake, there is an option to downmix it to Dolby Surround. What will be the result of it?
Will I simply get normal stereo signal only in the left and right front speaker, just Dolby encoded or will I also get some audio signal from the rear speakers?


HandBrake version (e.g., 1.0.0):

1.2.2


Operating system and version (e.g., Ubuntu 16.04 LTS, macOS 10.13 High Sierra, Windows 10 Creators Update):

Windows 7

User avatar
BradleyS
Moderator
Posts: 1772
Joined: Thu Aug 09, 2007 12:16 pm

Re: "Mixdown" DTS 2.0 to Dolby Surround

Post by BradleyS »

https://en.m.wikipedia.org/wiki/Dolby_P ... y_Surround

It's matrix encoded. You will need a compatible Dolby-capable receiver set to one of the appropriate Dolby decoding modes. Otherwise, you'll hear stereo.

User avatar
BradleyS
Moderator
Posts: 1772
Joined: Thu Aug 09, 2007 12:16 pm

Re: "Mixdown" DTS 2.0 to Dolby Surround

Post by BradleyS »

Aside, if the source audio is truly stereo with no matrixed or discrete components, then the stereo mixdown will be irrelevant and you will have stereo.

bip
Posts: 2
Joined: Mon Jul 22, 2019 11:17 am

Re: "Mixdown" DTS 2.0 to Dolby Surround

Post by bip »

In other words, if I mix down Stereo to Dolby Surround/Dolby Pro Logic, I will just get a normal stereo signal when played without matrix decoding and some surround effect when decoded properly? Will it be different from playing normal stereo with matrix decoding enabled?

Another related question: it Handbrake yet able to properly mixdown lossless DTS-HD MA tracks? I remember that some time ago only the lossy core was used for mixdown even when selecting the DTS-HD MA track.

musicvid
Veteran User
Posts: 3456
Joined: Sat Jun 27, 2009 1:19 am

Re: "Mixdown" DTS 2.0 to Dolby Surround

Post by musicvid »

Encoding for PLII Dolby involves adding a 90 deg. phase shift to one channel in order to facilitate the matrix decoder. The Dolby White Paper says that during stereo playback, the shift is "normally indistinguishable," or words to that effect.

Post Reply