You are saying that you see something on the video and then hear the sound about 500 ms later?
I have not idea how to fix that. On my Onkyo system I can fix video lag up to about 100 ms, but I have not seen any provision for correcting audio lag.
I'm curious how you measured the amount of lag?
Hi all, I recently purchased a decent 5.1 surround sound system that uses a Denon A/V receiver (http://www.usa.denon.com/ProductDetails/4538.asp) and I have been experiencing some audio lag when using the optical audio connection.
I have had great success using the 5.1 with my PS3, XBox and cable (all connected through HDMI to the receiver), but I have had problems with video and audio syncing when I have my computer running through the receiver. I am currently using a Creative USB Sound Blaster X-Fi (http://tinyurl.com/cyjztt) with the optical audio out as the way I am connecting to the receiver. Prior to using the new sound card, my audio worked fine. I got the new one to output to 5.1, which in itself is also giving me problems, but that's a question for another forum.
When I tried playing a game or watching a video there is a noticeable 500ms lag between the video and the audio. This also occurs when I play any music as well, so it's not just during video or games, and the lag is quite frustrating. I'm not sure if it's a combination of the optical audio connection or if it's the sound card.
I realize that this might not fall completely underneath the home audio & video forum, but I just wanted to see what people thought. Thanks and let me know if you need more info.