Apple Logic Pro 9 - Manual (Page 1142)

Channel Strip Objects
The Environment’s channel strip object is the building block of the Environment’s Mixer
layer, the Mixer, and the Arrange channel strips. For details about channel strip types, see
Understanding Channel Strip Types in the Mixer .
Mixer layer channel strip
object
Arrange channel strip
object
Mixer channel strip
object
The audio and (software) instrument tracks you see in the Arrange window are actually
routed to channel strip objects on the Environment Mixer layer.
The Mixer channel strips and Arrange channel strips are simply remote controls for the
underlying channel strip objects in the Environment Mixer layer. Their inclusion in these
other windows makes your workflow faster and easier.
1142 Chapter 37 Environment Objects Reference