Accommodating Stereo Playback
Even with the popularity of 5.1 systems, you should always address stereo reproduction.
There are three basic ways to do this:
• Prepare a new stereo mix from the original multitrack elements (using conventional
• Prepare a studio-adjusted downmix from the multichannel mix. This method takes
advantage of the work that has gone into mixing the 5.1 version. It retains flexibility in
the exact proportions of each channel represented in the final stereo mix.
• Let the decoder derive a stereo downmix, based on preset formulas in the decoder.
Downmix options and dynamic range control effects can be previewed and adjusted
in the production studio, and a range of adjustments is possible.
Always check the mix on an inexpensive surround system to evaluate how well it sounds
on modest playback systems.
Note: For more information about Dolby Digital Professional, see “Frequently Asked
Questions about Dolby Digital Professional,” available at the Dolby Laboratories Inc.
Creating Dolby Digital Professional Output Files
Using Compressor, you can create iTunes-compliant H.264 files. These can be played in
iTunes, on an iPhone, iPad, or iPod, or with Apple TV.
The efficiency of the H.264 encoder makes it well suited to create media to use with
iTunes and its related Apple devices. Compressor includes preconfigured settings that
use the H.264 for Apple Devices Encoder pane to make it easy for you to create suitable
For information on creating H.264 files for other uses (such as web video), see
QuickTime Movie Output Files
This chapter covers the following:
About the H.264 for Apple Devices Encoder Pane
Chapter and Podcast Markers for Apple Devices
Aspect Ratios for Apple Devices
H.264 Workflows for Apple Devices
Configuring Settings for H.264 for Apple Devices Output Files