Adobe Premiere Pro CC v.7.xx - Manual (Page 384)

Multiple stereo assignments for tracks to multichannel masters
Keywords: Multichannel audio, multi channel stereo, audio mixing, audio mixer, channel assignments, audio channels
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New in Premiere Pro CC
Adobe® Premiere® Pro lets you assign a mono or standard track to multiple channel pairs in a multichannel master.
Use the Audio Track Mixer to assign tracks to multiple channel pairs.
Click Window > Audio Track Mixer to display the Audio Track Mixer.
To assign channels, click the Direct Output Assignment button for the standard and mono tracks in the Audio Track Mixer.
Direct Output Assignment button
From the Assign Stereo Pairs dialog, set the stereo pairs you want to assign to a track. For example, you can assign stereo pairs 1+2 and 3+4.
Assigning stereo pairs to track
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