User:Jeff Kelley/Multichannel Audio

   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)