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 Software > Tips & Tricks

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 08-23-2001, 07:45 AM
McGriffy McGriffy is offline
Member
 
Join Date: Jun 2000
Location: Austin, TX
Posts: 125
Default Surround (ambisonic) mixing in LE

In response to a request on another thread I have written up a short web page to explain how I do surround mixing in ProTools LE. I am using a technique called ambisonic recording and what I've done is build an ambisonic transcoder in PTLE. This lets you use the normal stereo sliders to create a full surround mix. An example session (with no audio, thus small) is available for download. See
http://mcgriffy.com/audio/ambisonic/transcoder/
Reply With Quote
  #2  
Old 08-24-2001, 10:57 AM
Zeus Zeus is offline
Member
 
Join Date: Jun 2000
Location: Finland
Posts: 864
Default Re: Surround (ambisonic) mixing in LE

Great! I have to check it out. [img]images/icons/cool.gif[/img]

Z
Reply With Quote
  #3  
Old 08-25-2001, 07:29 AM
sandman sandman is offline
Member
 
Join Date: Jan 2000
Location: israhell
Posts: 412
Default Re: Surround (ambisonic) mixing in LE

thanx for that !
i'll check it also !
but one think i wanted to ask for long time , will i able to add a surround track(song) to a normal CD (ie , bonus track . .)
i thought all the time that multi channel music avalible only in DVD or SCD(?)

thanx again
__________________
Oh, it gives off an orange cloud of light, that just flows right out over the sea... wow!
Reply With Quote
  #4  
Old 08-25-2001, 09:28 AM
McGriffy McGriffy is offline
Member
 
Join Date: Jun 2000
Location: Austin, TX
Posts: 125
Default Re: Surround (ambisonic) mixing in LE

Yes, it is possible to put surround material on a redbook CD. Dolby Pro Logic or any of it's older variations are matrix formats, i.e. are designed to be transmitted in two normal channels. The same is true of a format called UHJ, which is a way to matrix an ambisonic source into two channels. Similar ideas - you take the extra channels and add them out of phase in different directions to L & R then you can extract them with phase shifts, sums, and differences. Tha advantage of matrix formats is that they also work if just listed to in stereo. Most VHS movies are apparently in Pro Logis these days, though I don't have a home theater system so I can't say for sure. Using a matrix format your whole album could be in surround for those with decoders but still fine for stereo (and mono) folk. Wendy Carlos Switched on Bach 2000 is done in Pro Logic and the Cowboy Junkies Trinity Session is in UHJ as a couple of examples.

The other thing you could do put DTS on a CD. This gives you real 5.1 discrete surround. The trouble is that it is just noise at -12dBFS for anyone without a decoder. I would hesitate to put such a track at the end of a normal CD. Then again, you could just put a minute or two of silence in between as a warning. Anyone who has left the CD playing through minutes of silence probably needs to be woken up. DTS encoding software is available as a Mac only plugin from Kind-of-Loud or as a stand alone PC product from Minnetonka Audio. The CD rate product from Minnetonka runs about $500.

DMcG
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 Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Surround mixing NOT possible with 002? EricWillhelm 003, Mbox 2, Digi 002, original Mbox, Digi 001 (Mac) 4 10-13-2008 08:18 AM
Surround Mixing Scott Nelson VENUE Live Sound Systems 2 11-01-2006 11:39 PM
HUI Surround Mixing studioalaluna Post - Surround - Video 2 04-29-2005 09:00 AM
Surround mixing Randy Wright Post - Surround - Video 6 02-15-2004 05:07 PM
Mixing 5.1 surround in PT Oli P Tips & Tricks 5 05-26-2000 05:26 AM


All times are GMT -7. The time now is 11:23 PM.


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