System information
Routing audio to the low-frequency effects (LFE) channel
Perform either of the following actions to send audio to the low-frequency effects (LFE) channel:
n Click the button in the Surround Panner window to switch to LFE mode.
n
Right-click the surround panner on the track or Mixing Console channel strip and choose LFE
Only from the shortcut menu.
To return to normal surround panning, click the button in the Surround Panner window again or right-
click the surround panner and choose Surround Pan from the shortcut menu.
Select the Enable low-pass filter on LFEcheck box on the Audio tab of the Project Properties dialog if
you want to apply a low-pass filter to each track or bus that is assigned to the LFE channel. Enter a
frequency in theCutoff frequency for low-pass filter box to set the frequency above which audio will
be ignored by the LFE channel, and choose a setting from the Low-pass filter quality drop-down list to
determine the sharpness of filter's rolloff curve. Best produces the sharpest curve. For more
information, see "Setting Project Properties" on page 53.
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.
Before rendering your surround project, check your surround authoring application's documentation
to determine its required audio format. Some encoders require a specific low-pass filter cutoff
frequency and rolloff, and your encoder may require that no filter be applied before encoding.
Changing the pan mode
Right-click within the Surround Panner window (or right-click a surround panner on a track or bus),
choose Pan Type from the shortcut menu, and then choose a pan type from the submenu. For more
information about panning modes, see "Audio panning modes" on page 444.
The selected panning mode is also used for surround panning keyframes.
Using the grid to monitor panning
The grid in the Surround Panner window provides a visual indication of how your panning will sound. The
grid spacing changes to match the current panning mode.
The vertical lines represent the points where the left-to-right signal ratio is 6 dB, 0 dB, and -6 dB respectively:
at the far-left line, the left channel is 6.0 dB louder than the right channel.
The horizontal lines represent the points where the front-to-rear signal ratio is 6 dB, 0 dB, and -6 dB
respectively. As you adjust the Center fader, the lines will move forward or back to compensate for the
center-channel gain.
The grid assumes that you're using a correctly set-up surround system (matched speakers and ideal
positioning). Variations in your monitoring system will cause inconsistencies between the graph and
perceived output.
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