welcome to the wonderful world of flash.

try this tip, if it plays find in the stage an only loses sync when you play it in flash player then export the wav with all the sound effects and voices on one clip

and add that clip in and delet the rest

that helps me alot

Try this: Add a blank layer, put a sound on it, set it to stream and infinite loop and lower the volume of the sound so it isn't heard. The timeline will constantly sync with that layer, so the timing on any sound effects you've added in will match up the way it should.

That's what we do and it always works.

Try this: Take a big wet shit on your keyboard then smear it into all the little crevices in between the keys. Make sure you pack it all in and under the keys very tightly. Preheat the oven to about 450 F and put the keyboard in for around 10 minutes. Remove the keyboard and serve.

I feel your pain.

I hear event sounds don't suffer from sync problems. But lemme give you the Swain solution.

Go to the layers containing all your audio. Every 30 seconds, remove two frames from all sound layers. So for example, by the time you've hit the 4 minute mark, you should have deleted a total of 16 frames from every sound layer. This ruins the sync of your FLA but the SWF should play fine.

Tada, the Swain ghetto fix. I suggest doing this to your FLA only after you're sure you're not gonna be making any changes that rely on audio sync.

one time i set my framerate to 24.7 or something and since then ive never had any major audio problems

Oh, that's happened to me hundreds of times! And I always find a way around it, only to forget it next time I need!
It's very stressful indeed! I once simply quit adding a fancy introduction I had made for a movie because of this. Flash was driving me mad, so I just stopped and submitted the movie the way it was.

Yeah... sound sucks.
Know on my recent project I did the sound thorgh action script and And don't know why the sound it scewed up. I thought it might have been because some keyframes were on stream with no sound or somecrap like that but it would PLAY sound that weren't even there!!!!!! I don't know if it's because I did with action script or WHAT but if you want to see what I mean play my recent game and fail you'll notice random sound effects play on the first frame. I noticed that the more frames I fixed the less random sounds play but when I corrected them all more played then before!!! well I feel for ya man!! I can't wait to see what the finished product will!!!! JUST DON'T GIVE UP OK!!!!!

Yea, that bugs happens a lot with long animations, so how do you fix it? there are two things to think of, first it must have a decent quality bit rate when exported, like 56 kbps or so. Also, the way we've found out NEVER TO FAIL (even with 10+ min length movies) is to get the scenes, copy all of it and paste it into a movie clip, so you'll have like a movieclip per scene. So you get all the movieclips into one scene (yeah, the whole movie into a scene, just one frame per movieclip). Then, actionscript a bit, the scene that has ALL the movieclips> add a stop() at every movieclip at the scene that has all movie clips. Add a play() inside every movieclip at the very last frame of each movieclip. It should work perfect now, plus you get an easier way to do scene selection and stuff.

What I do now is just make a single, big mp3 of all the music, sfx and voices in Audacity. You can distribute the sounds to different "layers" in the program, sync everything up, and then export everything in a single file. (Note: I do the audio before any drawing/animating.)

You import the finished audio into flash and stick it in a movieclip, which then goes onto the main timeline (make sure it has enough frames). I go ahead and use the same layer the movieclip went on to use the sound file again so that I can do syncing as I animate (don't forget to remove it before exporting, though).

So far, that's had zero issues. But, it seems like everyone has their own improvision to getting it to work. It's a shame, really.

here is my solution
insert sledge through computer or monitor
that is what i did with my laptop when it was causing me trouble
actually i tried to get my brothers fist through it first, then tried to hack saw it and then i placed a sledge hammer through
but if you really want to find out what a laptop looks halfway through it get a chainsaw

I set the sound to ADCPM (or however the fuck it's spelt) which syncs things up a nice treat. Haven't made anything long in a while so i'm not sure to what extent.

I'll tell you one of my secrets -

I RARELY animate with movieclips..lets alone imbed sound in them. I use all symbols and put the sound on the main timeline.