QUOTE(little ice @ Dec 27 2011, 01:20 PM)
download reaper from
http://www.reaper.fm , then try to import all the audio files to check if they're in sync.
it's simply too weird to be off sync if you simply import the audio files and do nothing.
also, remember to
set the tempo first before you import anything, you may not realize some DAW will stretch or shrink the audio file when you adjust the tempo. great feature for "beat making" geared DAW like Ableton but a disaster for mixing.
by the way, i can probably record my violin for some bass notes by pitch shifting them down so the intro won't sound so "floating" due to lack of bass notes. or you can do something with the guitar?

Will check on Reaper later.
Actually here's what I did. I make sure when I select the audio track, the 'warp' function is always turned off. In Ableton, if you turn off this feature, it will always follow the general tempo that you keyed-in at upper right corner near the menu. After I've done that, I mark where the first beat should be and i zo0m to that area and drag the entire audio track to where it should be. For example, the violin track and bass track I know exactly where the first bass note should hit, so I drag the bass track to coincide or synch with the violin track.
If there were out of synch portions later in the track do you think it's probably because of human error during playing/recording? If so, then I may need to cut portions of the track to compensate on the general tempo.
No need to re-record the violin track. It's supposed to sound like that anyway, unless you have a cello to record with.