AE only does stereo. For DCP you would have to treat the audio separately, anyway, if you export as image sequences. Well, whatever, it's a moot point. do your audio processing in Audition or Premiere.
The sound comes from an editor who is a pro and knows how to deliver 5.1.
I also have premiere ( 5.5 ) so I guess I can import the film and the audio in there and then export for a convert to DCP.
Or if I understand you right I can use a CDP processing software like
and there I import still images and the sound seperate?
That´s how it works?
If your audio person can do 5.1, it should be no problem to deliver a stereo file to use as an audio reference in AE.
Rarely -- if EVER -- does one use AE to deliver video files with the final audio track. If all is set up properly in AE, the application has never failed me in delivering properly-timed animation and motion graphics. This includes delivering video with lip-sync audio.