Using the Audio Mixer
You can use the faders and sliders in the Audio Mixer 
to quickly set audio levels and pan for clips, or you can 
record keyframes to create mixer automation over time.
This chapter covers the following:
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Making Basic Audio Adjustments with the Audio Mixer
(p. 81)
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Making Stereo Pan Adjustments with the Audio Mixer
(p. 89)
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About Mixer Automation and Keyframe Recording
(p. 91)
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Using a Control Surface with the Audio Mixer
(p. 100)