System information
5.1 surround projects
Create a 5.1-channel mix to wrap a listener in your remixes or prepare audio for DVD-Video or 5.1-channel
music projects.
5.1 surround is a standard audio format consisting of five full-range channels and a low-frequency effects
(LFE) channel.
The five full-range channels are reproduced by left, right, and center speakers positioned in front of the
listener and left and right surround speakers positioned behind the listener. The LFE channel can be routed
to the main speakers or to a subwoofer that can be positioned almost anywhere.
The center channel is typically used to lock dialogue or sounds to a video screen. The LFE channel is
generally routed to a subwoofer to enhance low audio frequencies for effects such as explosions or crashes.
Audio in this channel is limited to a range of approximately 25 Hz to 120 Hz.
Setting up your 5.1 surround project
Use the Project Properties dialog to set up your project for 5.1 surround.
To preview a 5.1 surround project, you'll need the following hardware:
n A 5.1-compatible sound card.
—or—
n A sound card with three stereo outputs.
—or—
n Three stereo sound cards.
n Six powered speakers or six passive speakers with a six-channel amplifier.
Setting your project to 5.1 surround mode
1. From the File menu, choose Properties.
2. Select the Audio tab.
3. From the Master bus mode drop-down list, choose 5.1 Surround.
4. Select the Enable low-pass filter on LFE check box if you want to apply a low-pass filter to each
track that is assigned to the LFE channel. Enter a frequency in the Cutoff frequency for low-pass
filter box to set the frequency above which audio will be ignored by the LFE channel.
Applying a low-pass filter approximates the bass-management system in a 5.1 decoder and ensures
that you're sending only low-frequency audio to the LFE channel.
Chapter 22
5.1 SURROUND PROJECTS433