Export 4Channels of Audio?

[r]Evolution wrote on 4/4/2010, 10:18 AM
Does anyone know of a way to export a Video File w/4Channels of Audio?
(or a way to create the following)

We need to deliver a Broadcast File (Quicktime) that has:
Video Track
Audio 1 = Left
Audio 2 = Right
Audio 3 = Music
Audio 4 = Audio FX

All Media is already separated on the tracks and the audio mix is the way we want.

Possible to create Busses and export this way to achieve the 4seperate channels of audio?

To what format? Settings? Workflow?
Should I be thinking Sony MXF, Quicktime, AVI... what?
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Apparently, this is really easy to do in FCP.
http://www.geniusdv.com/weblog/archives/exporting_multiple_audio_tracks_with_quicktime.php

Maybe the simplest way is to just Export from Vegas/Import to FCP/Export to QT?

Comments

TheHappyFriar wrote on 4/4/2010, 10:53 AM
setup your project for surround sound & then only use the four main speakers (no center/sub). Put the corresponding audio to a specific speaker (you can mute any speakers on a track by clicking once on a speaker to mute it. Blue = active, dark gray = inactive) & then export to separate waves.

Or mute all the audio except the audio you want, export a file, repeat for other audio sets.

I think vegas supports 2+ channels wav's now too, I forget.

But the issue will be the specific codec you want for delivery. does it support 2+ audio channels?
TimTyler wrote on 4/4/2010, 11:16 AM
You can export a multi-channel WAV file in Vegas.

I forget exactly how, but I think you first setup a separate audio bus, route all your channels to that bus, and then select that bus in a menu during the "render as" multi-channel WAV procedure.

I've done it and it works well. Just like BWF but no timecode :)

Sony will get a lot of industry love if they can make BWF export work in either Sound Forge or Vegas. I personally know a bunch of people who wish that was there.
farss wrote on 4/4/2010, 2:15 PM
Yes,
MXF allows 4 channels of audio. You can do it directly from Vegas.
You need two busses. When you render to MXF tick the Enable Multichannel Audio Box. AVI files also enable multiple channels of audio. All pretty well covered in the manual.

If your still stuck after reading the manual ask me, sorry but I don't want to retype the manual.

Bob.
[r]Evolution wrote on 4/4/2010, 3:39 PM
"All pretty well covered in the manual."
...which I've been reading/searching all day. Based on the advice given here I think I'm on the right Track(s).

- It's hard to find when you don't know the exact search terms... but MXF or AVI looks like the way to go - from Vegas Help under:
Rendering Multichannel Audio Files
posted here so noone has to retype the manual.
farss wrote on 4/4/2010, 4:50 PM
OK, now I have a minute to try this out and you've hopefully found out how to to the multichannel thingy from the manual. That's the easy part and to get what your client wants is not covered in the manual. Better to spend the little time I have helping you with that.

First off unless you want to go down a long road with intermediates you need to download a copy of Stereo Tools:
http://www.kellyindustries.com/stereo_tools.html

Once you got that do this:

Create 4 busses, A,B,C,D.

Route your full mix to Buss A.
Send your music to buss C
Send your FXs to buss D
Apply the Stereo Tools VST FX to Buss c and bus D. Select mono.
Pan buss C hard left, pan buss D hard right. Rclick the pan handle and Select Film ( I think that'll avoid adding 6dB gain)
Route busses C and D to B.

The mono mixdown may still create clipping and you may well need to reduce the gain on busses C and D by 6dB.

Now when your goto render you just map busses A and B ignoring the rest.

Hope this helps. You may well need to add more busses of course depending on your project.

Bob.