Originally Posted by Sammy2
Need a bit more information.
(Guessing you meant that was meant for me)
First off, I'm not really an advanced user when it comes to setting up sound systems (apologizing beforehand ;>)
I have an old "DVD Receiver" that was part in some sort of home theatre-bundle from 2007, It's called LG HT76TZ
Audio comes from the SPDIF-port on onboard soundcard of the HTPC > to the receiver.
Video comes from the HDMI-port on the HTPC > to the TV.
I did not buy the receiver and I have no idea where to find any kind of manual. So the only real "specs" I can gather is from the stickers.
The only soundrelated sticker I could find says that it supports "DTS surround" and "Dolby Digital Pro Logic II"
Everything is set up according to this Setup Guide (SPDIF), with the most recent builds of all software except for DSLibdvdnav and Arcsoft TMT.
When I play an MKV with DTS audio bitstreaming works just fine with perfect lipsync, however, when I bitstream with DD(AC-3) audio is oos.
Did some more tests just now while writing.
Files with DTS audio seem to always be in sync:
DirectSound > still in sync (tho no multichannel)
ffdshow audio trying as many settings variations I can come up with > all in sync
LAV Audio (same deal) > all in sync
Files with DD (AC-3) audio seem to always be out of sync:
DirectSound > less out of sync than bitstreaming (no multichannel) about 20-40ms delay set in MPC-HC and it looks okay
ffdshow > 45-60ms delay in ffdshow>output looks okay
LAV Audio > 250ms delay in lavaudio looks okay
any clue as to why DTS works like a charm while Dolby Digital (AC-3) just wont stay in sync?