Sound doesn't align with picture in both playback and when exported

​@Averdahl ​@PaulMurphy,

Thanks for the instructive information. I did not know the issue with bluetooth headphones. I thought this might be as simple as the latency setting in PR, but, while it might play a role, there are the other factors identified. And I’m wanting the solution to ​@tguma’s immediate problem: how to adjust? And that depends on identifying the problem(s), right? 

For example, back to ​@Averdahl’s initial approach, if the source media is in sync, and VFR is eliminated as the cause, shouldn't audio still linked with original video be okay? And if separate/unlinked audio was moved based on bluetooth resampling, will that produce a consistent out of sync? Or might it vary? In which case, there may be no easy fix; it could require resyncing every edit that is not already in sync?

Stan

There are a few possible causes here.
 

VFR could definitely be causing the issue. A frame rate of 29.99 sounds like VFR (unless you meant to type 29.97). Select a clip in the Project panel, then go to File > Get Properties for > Selection. If the clip is VFR, you will see "Variable Frame Rate Detected" in the Properties window. If this is the case, I recommend transcoding one of your clips to CFR and see if that fixes the issue.
 

Wireless headphones are also a bad option for monitoring audio where sync matters, because they can introduce delays. Some Bluetooth headphones resample audio to 44.1 kHz, which causes the lag and explains why you get different results between the speakers and the Bluetooth headphones.

Since you are getting different results from both, the important thing is to determine which one is correct. Load a sync cue into your timeline, something you know is in sync. I recommend File > New > Universal Counting Leader, which has a countdown and a pip on the 2 second mark. View it with both the speakers and the headphones. Whichever one plays in sync tells you where the problem is coming from.

Latency is something that can be a big problem when it rears its very ugly head. Agreed!

First, many audio pros have written, taught, and told me in person that you really REALLY should judge by your speakers not headphones. Headphones are ok for working when you must, but never ever rely on audio set by headphones. For many reasons.

Second, at times I’ve been given files that had different latency for some freaking reason than others, and that was a right royal pain. ​@PaulMurphy  is really good at sorting out audio things, so hopefully he can pop in. IF I pinged the right Paul Murphy …

Third, if some of the audio is from clips that are VFR … variable frame rate … that can also throw things off at times.

​@tguma It seems like a latency problem, iow that the system/Premiere is “tuned” for the wireless headphones and that give you issues when you playback through normal speakers. The exported file will probably playback normally on another computer.

A fast test would be to create a brand new project and import one of your source files you are working with and place it on a new timeline and just playback. Does it playback without issues through the wireless headphones and out of sync through the computer speakers now as well?

Exactly what is INSIDE the video you are editing?
Report back with the codec details of your file, use the program below
Free program to get file information for PC/Mac http://mediaarea.net/en/MediaInfo/Download

- a MediaInfo tutorial https://youtu.be/Ivy9ckSX1M0

- when you analyze your file in MediaInfo and post a screen shot in the forum, do so in TREE view
- post your information IN your message, not as an attachment that someone would have to download
.
Does your video use a Variable Frame Rate?
If yes, use https://handbrake.fr/ open source transcoder/converter to convert to Constant Frame Rate
Handbrake tutorial https://www.youtube.com/watch?v=xlvxgVREX-Y&t=34s