Apple Logic Pro 9 - Manual (Page 782)

To define a channel strip’s mono output
µ
Open the Output slot of a channel strip, and choose the required mono output from the
Output > Mono pop-up menu.
Using Surround Panning in the Mixer
Logic Pro allows mixdowns in several surround formats, even if your audio hardware
offers only two outputs. Because it would be difficult to mix or record in surround format
without being able to hear the result, it is best to not select this option if you’re monitoring
or mixing through stereo speakers.
All audio, instrument, and aux channel strips can be individually set to different surround
formats.
To set a channel strip output to surround
µ
Open the Output slot of a channel strip, and choose Surround in the pop-up menu.
The Pan control is replaced by a Surround Panner. The loudspeakers are represented by
colored dots, and the pan position is indicated by a white dot that can be dragged.
Surround Panner
For details about the use of the Surround feature, see Working with Surround .
782 Chapter 27 Mixing