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WORKING WITH 5.1 SURROUND CHP. 12
Setting up surround hardware
Before you create surround projects, you should set up your system to provide 5.1 surround playback. To play
a 5.1 surround project, you must have an appropriate speaker setup such as:
• Six powered speakers
• Six passive speakers with a six-channel amplifier
Your system must also have an appropriate sound card setup such as:
• 5.1-compatible sound card
• Sound card with three stereo outputs
• Three stereo sound cards
There are several ways to set up your system, depending on the sound card and speaker setup you are using.
Setting up surround projects
You can configure a Vegas project to use 5.1 surround in the Project Properties dialog. You can also choose
to apply a low-pass filter for 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.
1.
From the File menu, choose Properties.
2.
Click the Audio tab.
3.
From the Master bus mode drop-down list, choose 5.1 surround.
4.
To limit the audio sent to the LFE channel, do the following:
• Select the Enable low-pass filter on LFE check box and enter a value in the Cutoff frequency for low-pass filter
box. The low-pass filter isolates the audio sent to the LFE channel by limiting it to frequencies lower
than the value entered in the
Cutoff frequency for low-pass filter box.
• Choose a setting from the Low-pass filter quality drop-down list to determine the sharpness of the filter’s
rolloff curve.
Best produces the sharpest curve.
Note:
Before rendering your surround project, check your
surround authoring application’s documentation to determine
its required audio format. Some encoders require a specific
cutoff frequency and rolloff, while other encoders require that
no filter be applied before encoding.
Six powered speakers Six passive speakers with a six-channel amplifier
5.1-compatible
sound card
Connect powered speakers to your sound card’s
outputs as indicated by your sound card’s
documentation.
Connect your sound card’s front, rear, and center/subwoofer
outputs to the appropriate inputs on a six-channel amplifier/
home theater receiver. Connect front, rear, center, and LFE
speakers to the amplifier.
Sound card with
three stereo
outputs
Connect powered speakers to your sound card’s
outputs where you have routed each of the pairs of
channels. The left channel of the Center/LFE pair is the
center channel; the right channel is the LFE channel.
Connect your sound card’s outputs to the appropriate inputs on
a six-channel amplifier/home theater receiver. Connect front,
rear, center, and LFE speakers to the amplifier.
Three stereo
sound cards
Connect powered speakers to your sound cards’
outputs where you have routed each of the pairs of
channels. The left channel of the Center/LFE pair is the
center channel; the right channel is the LFE channel.
Connect your sound card’s outputs to the appropriate inputs on
a six-channel amplifier/home theater receiver. Connect front,
rear, center, and LFE speakers to the amplifier.