Adobe AUDITION 1.5 - Manual (Page 234)

CHAPTER 10 226
Creating Surround Sound
• Fold Down To Stereo Settings folds down the 6-channel playback to a stereo playback
on a non-Windows XP system or a system without a 5.1 playback setup. Specify the
attenuation parameters to control how the levels of the Center, Surround, and LFE
channels get mixed down with the front stereo channels and played back on a stereo
output system. The defaults are usually good settings for most files, but you can enter
any value in any of these three fields between 0 and –144 dB, as desired.
• Show Codec Formats That Most Closely Match The Session’s Sample Rate limits the list
of selectable WMA kbps options to those that are the same sample and bit rate as the
multitrack session’s files.
Exporting to a mastering or duplication service
If your project is to be sent out to a mastering, duplication, or other outside service with
the intention of being encoded into other specific surround or media formats, check with
the recipient as to the format specifics.
Channel ordering differs between surround formats, as do the crossover frequency points.
For example, Digital Theater System (DTS) typically employs a crossover of 80 Hz,
meaning that all frequency content of your channels lower than 80 Hz can be routed to a
subwoofer, and all frequency content greater than 80 can be sent to the main channels.
This differs from the Dolby Digital system that utilizes a crossover point of 120 Hz. Some
systems also employ a boost of 10 dB for the LFE channel, automatically assuming your
LFE content will be approximately this much lower in power than the main channels.
Therefore, these components should be accounted for in your mix before you deliver your
master files to the recipient. It is best to inquire with the recipient about all such require-
ments to ensure that the audience will hear your project the same way you are hearing it
on your monitoring system.
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