Cable Forum - View Single Post - TiVo PCM + Dolby Digital + Volume + Lip sync issues

Risco · 09-09-2013, 18:20

Has anyone noticed that channels that present in PCM require a different audio delay in the amplifier?

For example I have a Sony Amp and TV with Dolby Digital it needs 100ms delay to keep lips in sync. However it requires 130ms for anything produced in PCM. Now of course you would think why not set the TiVO to PCM only? Well this is great and solves lip sync issue, but you lose multi channel sound!

Another issue is the massive difference in volume between Dolby Digital and PCM channels. If I switch from a DD to a PCM I need to lower the volume a lot and increase a lot when going the other way!

My PS3 and Apple TV on the other hand only need a 70ms, both of course run dolby digital. So what gives? Is this something that a software update can fix?

09-09-2013, 18:20	#1
Risco Inactive Join Date: Sep 2009 Location: Maidstone Services: VIP; BB XL; TiVo 1TB; V+HD Posts: 674	PCM + Dolby Digital + Volume + Lip sync issues Has anyone noticed that channels that present in PCM require a different audio delay in the amplifier? For example I have a Sony Amp and TV with Dolby Digital it needs 100ms delay to keep lips in sync. However it requires 130ms for anything produced in PCM. Now of course you would think why not set the TiVO to PCM only? Well this is great and solves lip sync issue, but you lose multi channel sound! Another issue is the massive difference in volume between Dolby Digital and PCM channels. If I switch from a DD to a PCM I need to lower the volume a lot and increase a lot when going the other way! My PS3 and Apple TV on the other hand only need a 70ms, both of course run dolby digital. So what gives? Is this something that a software update can fix?