Sequencer broken Audio

I have a sequence that contains a couple of camera cuts, and one single song in the audio track. I arranged it so when there’s a certain beat in the song, I cut to a different camera.

While I have the sequencer window open, and I’m only previewing, it all looks great. However, if I play that sequence while ingame, there is always an almost 1 second delay in when the beat is heard and the cut happens.

I tried with both “force fixed frame interval playback” on and off, same issue. When I preview the sequence, it cuts at the exact moment. When I’m playing the sequence ingame, there’s a delay between the cut and the beat.
I don’t know what it is, maybe unreal somehow starts playing the audio track with a small delay, before the cameras kick off, and that delay adds up.

But this is a big problem for me.

Hey noatom,

How long is your sequence? In Matinee, Audio tracks would get out of sync over time depending on frame time and performance. Would you mind sending me an example project? You can PM me a download link on the forums if you’d rather keep it private

Hi noatom,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will follow up.

Does this kind of thing happen in sequencer as well?

Hey HaxO,

I don’t believe this is something specific to Sequencer/Matinee. Deviations in frame time and frame rates can cause audio to become out of sync with the game if it is a long enough audio clip. It’s generally considered bad practice to try to play long audio clips that need to remain sync’d with any real-time cinematics or gameplay.

Hi , I have a very short sequence. About 18 seconds with 3 dialogue clips. When I play the clips from the half way through, they end well. But if I play the scene from the top, any clip longer that 3-4 seconds goes off synch. This is quite annoying to review the timing of a scene. I have only 2 actors. Rolling at 30fps in the 4.19 editor.

I have a project which is only audio (edited in shots with nothing except a camera in a black box).
In the sequencer editor playback there is good shot-to-shot audio continuity; however, in game playback (PIE) the audio shot continuity is noticeably incorrect, with the end of a shot often being slightly clipped. While the audio clips are short; the overall Sequencer timeline is 45 minutes (about 60 shots). The clipping becomes noticeable even after one or minutes of playback.

Interestingly, when I Render the Sequencer (to video), the audio for each shot loops several times, including deactivated audio tracks inside of shots. This might have to do with selected frame rate 120 being too high, or the compression set too aggressively, since the visual is just a black screen.