[Thomas Wong]"We can play out of FCP but it only outputs a stereo track. anybody know how i can playout from FCP keep all 8 individual audio tracks?"
What are you laying off to? Is this an HDSDI connection?
If so, you have to setup the FCP timeline for individual audio outputs, then assign each track to an outpoint.
First, dupe your sequence, then open the dupe and hit command-0 to being up the prefs. Click on the audio outputs tab and change the outputs from 2 to 8 dual mono and hit OK.
Back in your sequence, you need to assign the output of each track. An easy way to do this is to open the audio mixer and right click on the name of each track ("A1" for example) and choose which output you want that track to go to. you will need to do that for all tracks present in your timeline.