Not sure if this is the best place for this but it's more active than the audio thread and some of you may be familiar with this sort of stuff.
My current setup is an LG C8 with audio through a Samsung MS650 soundbar connected via ARC. I've always felt like I had lip sync issues but could never tweak the settings to get it completely right. The other day I played some Rock band for the first time in years and the auto calibration tools threw out some interesting figures.
My standard setup gave the following numbers:
That audio number seems really high? The maximum the in game adjustments allow you to compensate for is +300ms so I'm already pushing just past that limit (although the extra 4ms won't be noticeable). Also confused by the video numbers. I'm playing in Game mode with all prcessing switched off so shouldn't that be closer to 21ms?
My PS4 is pushing audio out via DTS Bitstream (as my soundbar can't handle 5.1 PCM). I thought I'd try switching to Dolby to see if it made a difference and got the following:
I'd read there were issues with using Dolby but I was surprised to see it added over 100ms of audio lag compared to DTS. Since the maximum the game can adjust for is 300ms that isn't even an option.
I tried some other scenarios to see if anything helped. I'll just link the rest of the pictures and put the figures in brackets.
Switched out the HDMI for Optical (using DTS again) but got near identical numbers (303 / 63):
https://abload.de/img/img_8133o9jwz.jpg
Removed the soundbar completely and went with TV speakers. This knocked about 50ms off the audio lag but it's still almost 200ms behind the video (245 / 65):
https://abload.de/img/img_8137dukqv.jpg
The soundbar has built in AV sync features. You can only increase though (+25, +50, +75 etc) and it does exactly what you'd expect:
+50 (359 / 64) -
https://abload.de/img/img_813900k54.jpg
+100 (412 / 61) -
https://abload.de/img/img_81409qjq5.jpg
The C8 also has an AV Sync Adjustment option in the menu. Again, it only allows me to increase though:
+3 (368 / 67) -
https://abload.de/img/img_8141p7jty.jpg
+6 (424 / 63) -
https://abload.de/img/img_8142x7klh.jpg
Strange that the sync options on both the TV and Soundbar only allow you to increase the audio lag and not the other way round?
Any suggestions where I go from here? Are the figures I'm looking at normal and nothing to worry about? I know 0.2 seconds isn't a huge gap but I can often tell that the audio is off from the video when people are talking. Not a big deal but it's mildly irritating.