The channels listed in the Audio Configuration window are always available and ready for usebut first you have to assign them to Audio Objects. The Audio Object itself initializes the channel and then acts as a virtual channel strip that you can use to control the channel's sound. Audio Objects are the last link that connects Logic to your audio interface, and their primary function is to show Logic where and how to send audio signals.
Creating and Populating an Audio Layer
In Lesson 11 you created a couple of new Environment layers to hold MIDI Instrument Objects. Now, it's time to make a new Environment layer for Audio Objects and create your first one.