5.1 Surround Sound

Baker Productions wrote on 1/3/2012, 11:53 PM
Can someone help me with the 5.1 surround sound feature? It all seems really straight forward with the exception of the LFE channel. I've set up the low pass filter in my project properties, but I'm not seeing any activity in the "levels" for my LFE channel when I play back my movie. The only solution I've come up with on my own is duplicating my audio tracks, and changing that track to "LFE Only." Any suggestions? Are there any good tutorials on this feature? Thank you in advance!

Comments

musicvid10 wrote on 1/4/2012, 3:08 PM
"Any suggestions?"

Yes, don't use LFE. It's pretty much outdated IMO.
Remember the movie "Earthquake"?

The LFE channel originated in Dolby Stereo 70 mm Six Track film prints, as a way of providing louder bass and sub-bass effects, without detracting from the quality of the standard audio channels. The LFE channel is conventionally played back 10 dB louder than the main channels, giving significantly more recording headroom. Also, the separate recording allowed a straightforward installation of extra dedicated subwoofers, and removed the need to upgrade the main speakers.

ChristoC wrote on 1/4/2012, 3:37 PM
> but I'm not seeing any activity in the "levels" for my LFE channel when I play back my movie.

What is the source of 'my movie'? i.e. was it specifically mixed with an LFE channel?

Despite musicvid's opinion, LFE is still very much used in production for the big screen.....
rraud wrote on 1/4/2012, 8:42 PM
Off topic, to my recollection, The "Earthquake" subs were Cerwin-Vega B36 18" reflex 'scoop' bins.. and recall setting the x-over at around 80Hz. I had a set of those when I was house engineer at a Manhattan nightclub.. about a hundred-years ago.. or so it seems.
musicvid10 wrote on 1/4/2012, 9:17 PM
Our local theater in the sixties and seventies seated about 150. The "Earthquake" subs were on platforms that covered the last three rows. They sealed off the next 10 rows because they were afraid it would hurt us kiddies' ears. Show was held over for weeks (we didn't have subsonic speakers in cars yet . . .)

And what a cast!
Charlton Heston, Ava Gardner, George Kennedy (of course), Lorne Green, Richard Roundtree, Marjoe Gortner, Victoria Principal, Walter Matthau, and the list goes on . . .

Baker Productions wrote on 1/4/2012, 11:19 PM
I guess this is where I'm confused... In this case, "my movie" consists of footage shot on a Canon T3i, and foley captured on a Zoom H4n. It's a high speed car chase, in which I collected audio of various trucks, and I'm using the surround feature to pan engine noises, revs, etc. What did you mean when you asked if it was specifically mixed with an LFE channel?
pwppch wrote on 1/4/2012, 11:23 PM
A simple workflow:

Add a sub bus.
- from the mix console, click on the add bus button.

Route it to the surround master bus
- this is the default, so you should not have to do anything.

Set it's pan mode to LFE
- right click on the surround panner in the mix console view for the new bus, and select LFE

You might want to label this bus "LFE", so it is easier to locate.
- select the new bus. Double click on its label or press F2. Edit the name as desired


On the tracks or other sub busses you want to contribute to the LFE mix, send to this LFE bus. Be sure to look at the pre/post send setting, and set as needed.
- make sue that the track on the time line is large vertically. You will see a send fader appear. Adjust the gain

Or

- on the mix console, show the sends region. Locate the tracks you want to send to, and adjust the LFE send gain.

You can also automate the send gain for each source sent.
- read abut automation and envelopes in the user guid or in help

Peter
Baker Productions wrote on 1/5/2012, 6:11 PM
Thanks Peter! I'm sad to say that I'm unfamiliar with the functions you described. I'll do my best to figure it out on my own, but can you point me in the direction of a tutorial that illustrates what you're talking about? Thanks again!

Joe
pwppch wrote on 1/6/2012, 10:08 PM
I addded some details above. I don't know of any tutorial.

The different aspects are all covered in the user manual and in the online help.

Peter