Regarding those, though probably just the last one for I haven't noticed the first:The engine sounds when driving are not synchronized with the action
quote: "Acceleration sounds are delayed and tend to continue long after I'm off the throttle (revving). They don't ever really match up with the action."
solution: Having a web browser (after watching at least a second of a youtube video) or video player (such as VLC or MPC) open while playing the game resolved this for 3 people. I don't think they actively have to be playing anything while you play the game.
Audio desynchronizes or skips/skipping
quote: "I'm fine on the hardware requirements, but the audio is getting way out of hand, to the point where it's almost unwatchable. I'm hearing what's happening roughly 2-5 seconds before I see it. Any one have any experience with this? " -- thread link
quote: "It's now gotten progressively worse, with characters speaking their dialog over each other, or leaving less then a second between replies. This is rapidly becoming unplayable." -- thread link
solution: Unknown, but go ahead and give the workaround for the one above a try.
Seeing how my CPU is kinda sucky, I've been using an FSB O/C to make the game run quite a bit better; downside I've experienced is that cutscene audio is desynced (and iirc too fast + higher pitched), which made me turn on subtitles.. I need to be able to hear/read the end of sentences as well.
Personally, I'd rather have smooth gameplay and crappy vids than reversed.
Just throwing this out there in case someone else might be stumped by the cutscenes and running an O/C (though mine is a software fsb o/c, so pretty niche I'd guess).