Apple Logic Pro 9 - Manual (Page 755)

Understanding Channel Strip Types in the Mixer
The Mixer displays the following channel strip types:
Audio channel strips MIDI channel strips Master channel strip
Instrument channel strips Aux channel strips Output channel strip
• Audio channel strips: Control the playback and recording of audio signals on audio
tracks. All data on the audio track is automatically routed to the audio channel strip
assigned in the Arrange track list.
• Instrument channel strips: Allow you to use and control software instruments. Software
instrument plug-ins are inserted into the channel strip’s Instrument slot. The instrument
channel strip can then be driven by a recorded MIDI region, or by direct MIDI
input—playing your MIDI keyboard. For details about instrument channel strips, see
Working with Instruments .
• Aux (Auxiliary) channel strips: Used for a variety of signal routing purposes. They are
used to set up send returns, where a channel strip signal is routed to an aux channel
strip for effects processing. Aux channel strips are also used for grouping purposes and
for distributing a signal to multiple destinations via sends. There are several ways to
create aux channel strips. For details, see
Creating Aux Channel Strips in the Mixer .
• Output channel strips: Represent the physical audio outputs of your audio interface.
These channel strips are used to adjust the overall level and stereo balance—or pan
position, in the case of mono output channel strips—of all audio, instrument, or aux
channel strips routed into them. The number of available output channel strips is
determined by the audio interface in use.
755 Chapter 27 Mixing