Audio shifts in playback when using Essential Sound
I've been trying out the new Essential Sound I'm having a strange issue in playback which when I apply effects to an audio file, the audio is delayed by a fraction of a second in unrendered and rendered playback and even when exported, although the track hasn't moved and the waveform graphic stays the same on the timeline. The video is a .MOV file straight out of a Canon 600D, and the audio is a mono 192kb MP3 from a shotgun mic to a Zoom recorder.
Here's a breakdown of what I've done so far:
In the case of this video I hadn't yet merged the camera's audio/video with the external mic audio - I've manually matched the waveforms in the timeline so that the two are in sync (the camera audio is muted). I can see that these waveforms are synced visually and when played back without any effects there is no delay issue.
The effects are only applied to the external mic track, which then shifts out of sync, although the track hasn't moved in the timeline and the waveform visual remains the same; supposedly in sync with the camera's audio.
I tried disabling the various effects applied in the Effects Controls section and the external mic audio is now back in sync. As I turned the effects back on, one by one, the audio shifted back out of sync when played back.
When I exported the video as a basic H.264 file with the effects on the problem was still there.
I tried moving the audio track back 8 frames (until it was audibly synced with the camera audio) so that it sounded correct in playback and exported that, but the audio was still out of sync.
I tried cleaning my media cache and restarting Premiere Pro etc, to no effect.
I then tried merging the camera footage and the external mic audio in the Project tab, and applied the effects via Essential Sound, and had the same problem - the waveform hasn't moved and in playback the audio is out of sync with the video. I render in-out and render audio and the playback problem is still there.
I then tried exporting the merged video as a basic H.264 and the sync problem is miraculously fixed!
So weirdly after merging the audio the problem still occurs in playback but no longer upon export? Obviously the exported video is main thing so that's fine but the playback problem is still a bit of an issue! The workaround of course would be to solo the external mic audio channel with the effects applied and export it as wav, then bring that back into Premiere - but that doesn't fix the problem with Essential Sound!
Any ideas as what might be causing this issue?
I'm running the fully updated Adobe Suite
Computer spec:
2013 27" iMac
3.5 GHz Intel Core i7
32GB 1600 Mhz DDR3
NVIDIA GeForce GTX 780M 4096MB
1.11TB Fusion Drive with 300GB free
10TB Lacie RAID with 466GB free (where the project and all the files are saved)
Thanks loads!
Ben
