Using the Passthrough Mix Tool
  The options in this section depend on the configuration of your system, so your system might not contain certain features and hardware that are covered in the documentation.
The Passthrough Mix tool allows you to select the mix and adjust the volume and pan values of the source audio that you monitor. You can adjust the mix, volume, and pan values of multiple monitored channels, controlling either individual channels manually or several channels simultaneously by ganging them together.
  The Passthrough Mix tool adjusts monitored audio only and has no effect on the recorded audio signal. You can adjust volume levels within a clip in the Timeline after you record audio by using Audio Gain Automation. For information, see Understanding Audio Gain Automation.
Passthrough Mix Tool button
To open the Passthrough Mix tool:
1.  In the Project window, click the Settings tab.
2.  Double-click Audio Project.
3.  Click the Input tab.
4.  Click the Passthrough Mix Tool button.
  You can open the Passthrough Mix tool by clicking the Passthrough Mix Tool button in the Capture tool or the Audio Punch-In tool. For more information, see and Creating the Voice-Over.
For information on using the Passthrough Mix tool, see the following topics:
  Resizing the Passthrough Mix Tool
  Monitoring Audio with the Passthrough Mix Tool
  Changing an Audio Level in the Passthrough Mix tool
  Adjusting Pan Values in the Passthrough Mix tool

Some features described in Help are available only in Avid Xpress Pro or Avid Xpress DV. For more information about Avid Free DV go to
www.avid.com.