Avid Pro Audio Community

Avid Pro Audio Community

How to Join & Post  •  Community Terms of Use  •  Help Us Help You

Knowledge Base Search  •  Community Search  •  Learn & Support


Avid Home Page

Go Back   Avid Pro Audio Community > Pro Tools Post Production > Post - Surround - Video

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 05-04-2012, 07:14 AM
Rockman413 Rockman413 is offline
Member
 
Join Date: Nov 2009
Posts: 492
Default 5.1 surround setup in pro tools is different than the ITU, how should we place speake

Hi guys,
As we know, the 5.1 surround setup in pro tools is different than the ITU.
Which one is more for Film?
Should I place my speakers according to ITU(in a circle) or like the 5.1 surround pan in pro tools(in a rectangle)?


And for ITU, the front 3 speaker are quite close to each other, How about the Cinema speakers? Are close to each other like ITU, or they are actually like the one in PT--The left one is at the most left of the screen, right one at the most right of the screen.
Reply With Quote
  #2  
Old 05-04-2012, 11:15 AM
Craig F Craig F is offline
Member
 
Join Date: Aug 2000
Location: Portland, OR
Posts: 12,606
Default Re: 5.1 surround setup in pro tools is different than the ITU, how should we place sp

for a proper film setup

if you are sitting directly inline of the center channel the left and right are at 45 deg. from centerline left and right and all speakers are sitting in the same plain

in smaller spaces the left and right can toe in a little if there field of throw misses the mix position in the single plain
__________________
...

"Fly High Freeee click psst tic tic tic click Bird Yeah!" - dave911


Thank you,

Craig
Reply With Quote
  #3  
Old 05-04-2012, 05:24 PM
ggegan ggegan is offline
Member
 
Join Date: Aug 2004
Location: Culver City, CA
Posts: 389
Default Re: 5.1 surround setup in pro tools is different than the ITU, how should we place sp

I personally am not a fan of ITU speaker placement. It does not conform to any real world speaker configuration I have ever seen, either in movie theaters or home theaters. I don't know of any venue where all the speakers are equidistant from the listener. There is an additional issue with ITU where noise-like sounds such as rain, waves or traffic roar which are panned simultaneously to the front and surround speakers can exhibit an acoustic phasing effect with slight movements of ones head due to minute variations in the arrival time of the sound from the various speakers. I find it is nearly impossible to perfectly time align the speakers so that you avoid this issue with near field speaker systems that are equidistantly placed unless your head is locked in a vice in the perfect position. In near field mix rooms I generally put a 10 to 15 msec delay in my surrounds if they are close to equidistant to the front speakers in order to avoid acoustic phasing and more accurately replicate what I am used to hearing on a large dub stage.
__________________
Gary Gegan
Reply With Quote
  #4  
Old 05-05-2012, 06:53 AM
Rockman413 Rockman413 is offline
Member
 
Join Date: Nov 2009
Posts: 492
Default Re: 5.1 surround setup in pro tools is different than the ITU, how should we place sp

Thanks guys!

So , I suppose we should place the speakers like the one in PT, right?
Reply With Quote
  #5  
Old 05-05-2012, 08:17 AM
Craig F Craig F is offline
Member
 
Join Date: Aug 2000
Location: Portland, OR
Posts: 12,606
Default Re: 5.1 surround setup in pro tools is different than the ITU, how should we place sp

I woudent call the panner's graphics totally correct but yes in that kind of a arrangement
__________________
...

"Fly High Freeee click psst tic tic tic click Bird Yeah!" - dave911


Thank you,

Craig
Reply With Quote
  #6  
Old 05-06-2012, 01:56 AM
Branko's Avatar
Branko Branko is offline
Member
 
Join Date: Jan 1999
Location: Lisbon, Portugal
Posts: 608
Default Re: 5.1 surround setup in pro tools is different than the ITU, how should we place sp

I would just add that in most studios the listening angle between L and R is slightly over 40º, so don't place your L and R too wide.
Most of the audience in theatres listens to a much narrower stereo, 20-30º at best.
__________________
------------------------
Branko Neskov c.a.s.
www.loudness-films.pt
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
PT9 Le with 002 and surround setup RuffinMedia Post - Surround - Video 1 03-25-2011 03:56 AM
surround setup Peter Groom Post - Surround - Video 0 05-15-2007 11:29 AM
Surround I/O setup pminfo Post - Surround - Video 7 12-19-2004 07:15 AM
Surround Setup Help axiom Post - Surround - Video 3 01-23-2004 08:03 PM
a place to start in surround polnetwork.com Post - Surround - Video 2 04-06-2003 05:01 PM


All times are GMT -7. The time now is 12:08 PM.


Powered by: vBulletin, Copyright ©2000 - 2008, Jelsoft Enterprises Limited. Forum Hosted By: URLJet.com