Does DTS have phase shifted surround channels?

[Mackan]

Hello,

I have a rather straightforward question, but that's been hard to find an answer to.

Does anyone know if there's a phase shift applied to the surround channels during the encoding process for multichannel DTS tracks that comes on blu-ray discs?

It's common to extract such tracks (for example as 5.1 DTS-Core) and re-encode to get an 5.1 AC3 or possibly an AAC stereo track as down mix, however, such processes may include further phase shifting on top of what may already be there on the original DTS track. This may cause a final audio track that just sounds wrong.

I've read indications that DTS may have 45 degree phase shift to surround channels, but cannot confirm. Does anyone know?

In general, is it possible to detect such phase shift in some waveform editor by checking frequencies or similar?

[SeeMoreDigital]

What's the movie. How old is it. Is it ES encoded?

[filler56789]

According to the PDF Manual of the Master Audio Encoder Suite,

ES Phase Shift

ES refers to the Extended Surround or center surround channel capability of DTS Digital Surround
technology. This option is only available for 6.x channel layouts and cannot be used in conjunction with
ES Pre-Mixed. Selecting ES Phase Shift performs phase shifting of left and right
surround channels by +/- 45 degrees prior to the addition of the center surround channel. The ES
Phase Shift option can only be selected for stream types other than DTS-HD Master Audio.

Note: DTS recommends enabling ES Phase Shift for 6.1 ES Discrete encodes.

Note: DTS recommends disabling ES Phase Shift for 6.0 and 6.1 ES Matrix encodes.

[Mackan]

According to the PDF Manual of the Master Audio Encoder Suite,

Yeah, that's basically what I read, as well. It seems to apply to DTS ES only. One can then assume that DTS-HD is free from phase shift.

However, due to the lack of information on DTS encoding (in my opinion), I don't feel convinced.

What's the movie. How old is it. Is it ES encoded?

Many movies. ;) As far as I understand, DTS-HD is the common format, while DTS-ES is more rare.

[filler56789]

Anyway, one can apply phase-shift to the rear channels before compressing to DTS-HD, regardless of the restrictions in the GUI of the Master Audio Suite, or in spite of what the user's manual recommends. :–/