Basic Mixing : Signal Routing for Monitoring and Submixing : Monitoring and Mixing Audio with Auxiliary Input Tracks
 
Monitoring and Mixing Audio with Auxiliary Input Tracks
Use Auxiliary Input tracks to monitor and mix audio from external sources, such as MIDI instruments, tape, or microphone inputs.
To use an Auxiliary Input track to monitor and mix external audio sources:
1. Connect the audio outputs of your audio source (such as a MIDI synthesizer or tape output) to available inputs on your audio interface.
2. Use an existing or create a new Auxiliary Input track with a channel format that corresponds to the channel format of your audio source (mono or stereo).
3. Set the input of the Auxiliary Input track to the corresponding input path.
4. Assign the track output to the appropriate path or paths for monitoring.
5. Adjust the Auxiliary Input fader to mix the audio input.