User:Jeff Kelley/Multichannel Audio
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Revision as of 03:18, 25 December 2007 by Jeff Kelley (talk | contribs)
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WORK IN PROGRESS
Introduction
Since QuickTime 7, it is possible to deliver multichannel audio. Second Life streamed audio relies on QuickTime and inherits this capability without further work.
Producing a multichannel audio movie
Step 1: Produce an interleaved multichannel WAV file
We are using ProTools. Bounce a multichannel session to Stereo interleaved format:
Step 2: Open with QuickTime Pro
Choose menu 'Show Movie Properties', select 'Sound Track', select 'Audio Settings' tab:
Step 3: Export to QuickTime Movie
Choose 'Export', 'Movie to QuickTime Movie', 'Options', 'Sound Settings', 'Channels'.
Channels Assignements
Left | L |
Right | R |
Center | C |
LFE Screen | LFE |
Left Surround | Ls |
Right Surround | Rs |
Left Center | Lc |
Right Center | Rc |
Center Surround | Cs |
Rear Surround Left | Rls |
Rear Surround Right | Rrs |
Multichannel Mixing and Surround Formats
Format | Channels | Layout |
---|---|---|
Mono | 1 | C |
Stereo | 2 | L R |
Cinema Stereo | 3 | L C R |
Quadraphonic | 4 | L R Lr Rr |
Dolby ProLogic | 4 | L C R S |
Film (Dolby Digital) | 6 | L C R Ls Rs LFE |
SMPTE/ITU | 6 | L R C LFE Ls Rs |
DTS | 6 | L R Ls Rs C LFE |
Dolby Surround EX | 7 | L C R Ls Cs Rs LFE |
SDDS | 8 | L Lc C Rc R Ls Rs LFE |
NOTE: delete Image:Jef Kelley Images QT Audio Tracks Assign.png (stupid one)