Adding Audio to MPG files for DVD

[Paulcat]

This sounds like a basic question (likely it is) but if I have a 6 channel WAV file, can I add that (remux) to an mpg file and encode that to a DVD (with the MPG being DVD compliant) and retain six channel audio on the finished DVD?

If so, can the same be done with a six channel AAC audio file? Or does DVD only use Wav and AC3?

[auenf]

the only valid audio formats for DVD are DTS, AC3, PCM and M2A.

Enf...

[mpucoder]

It is the job of the authoring program to multiplex video, audio, and subpictures (don't do it prior to authoring). For six channels the best choice is AC3 due to bitrate constraints and player support.
Six channel LPCM (wav) is supported, but only for 48K sampling 16-bit. Not many players will play more than 2 LPCM channels, though. DTS has 6 channels, but early players did not decode DTS, they could only pass it on to a licensed external decoder. And there is also mpeg audio with multichannel extension, which is poorly supported beyond 2 channels.
SDDS is also allowed, but no home players will play it, it is for theater use only.
AAC is not supported.

Keep in mind, to be compliant an NTSC DVD must have one audio track that is either AC3 or LPCM. PAL DVDs must have one track of AC3, LPCM, or mpeg audio.

[Paulcat]

Okay, is there is some way to covert from 6 channel AAC to AC3? AND, more importantly, can you add ac3 to the mpeg AFTER converting (I use TMPGEnc which downmixes to stereo) with some mpg tool?

[auenf]

pretty much all AC3 encoders want 6 mono wav (or aiff) files to encode from, besweet might be able to do what you ask, not sure if it can decode 6ch AAC tho. if 6ch AAC is a standard, dbpoweramp should be able to decode it to waves for you, otherwise you'll have to look further for a decoder

Enf...