yeah there's a really good chance that the audio will not remained synched. what I do is put them in CEP multitrack. I line them up at the beginning, then I listen VERY CAREFULLY (headphones work best, quality stereo headphones with a headphome amp [see playback forum] work a thousand times better) to when you can FIRST notice it coming out of synch. take note of how long it takes to come out of synch and re-align the music every x minutes. check the computer recording forum, there is many posts on this (I believe).