Apple Logic Pro 8 - Manual (Page 819)

Chapter 35 Working With Surround 819
Audio Channels
The channel strip of an empty audio track is automatically set to the format of the first
audio file added to it.
If you add an audio file to a track assigned to a different output format (adding a stereo
file to a track routed to a surround output, for example), the audio file is automatically
up or down mixed to match the output format of the channel strip.
Note: The highest possible surround format is determined by the project surround
format.
Instrument Channels
Instrument channels automatically adopt the channel format of the inserted
instrument.
If you insert a stereo instrument, the channel strip output will be stereo.
If you insert a surround instance of a software instrument (ES2 or Sculpture, for
example), the channel output will match the project surround format.
Aux Channels
Automatically created aux channels adopt the format of their input source (if a stereo
channel is routed to an aux, the aux will be stereo). If you manually change the output
format of an aux channel, Logic Pro automatically upmixes or downmixes the signal to
the required format.
Working With the Surround Panner
You use the Surround Panner to place track output signals at desired speaker positions.
You can manipulate the Surround Panner directly in the Mixer window or Arrange
channel strip, but it is far better to open it in a separate window.
To open the Surround Panner window:
m Double-click on the Surround Panner of a channel strip.
The Surround Panner window provides a magnified view of the channel strip’s
Surround Panner, and contains additional parameters.
Note: It is possible to open multiple Surround Panner windows simultaneously, and to
save them in screensets. The Surround Panner window also provides a Link button. If
enabled, the window will update to reflect the surround settings of the selected
channel strip.
The Surround Panner offers different functionality in mono to surround and stereo to
surround channels. When used on surround to surround channels, it acts as a balance
control.