TV- Audio Out of Sync



















AUDIO OUT OF SYNC


Due to the many different connection possibilities with home theater systems and high definition cables, there are times when the audio and video may become out of sync. In order to correct the situation you will need to determine the connection type you are getting the issue with.


Antenna


Does the audio delay only occur on certain channels?



If if does, the signal from the broadcaster has an embedded audio delay and you will need to contact the local broadcasting company to resolve the issue


When there is a packet error in the stream itself, there may be audio/video distortion or a popping noise. Broadcasts may operate in un-sync mode in order to avoid this issue.


Does the audio delay only occur on every channel?



Attempt to adjust the AV sync levels according to the type of connection you are using. If you are using the optical audio output, use the SPDIF adjustment. If you are only using the TV speakers to get sound, use the TV Speaker adjustment. These adjustments are made in milliseconds and can make the audio output faster or slower.


Cable/Satellite Box


Does the audio delay only occur on certain channels?



If if does, the signal from the broadcaster has an embedded audio delay and you will need to contact the calbe/satellite service providerto resolve the issue.


When there is a packet error in the stream itself, there may be audio/video distortion or a popping noise. Broadcasts may operate in un-sync mode in order to avoid this issue.


Does the audio delay only occur on every channel?



Attempt to adjust the AV sync levels according to the type of connection you are using. If you are using the optical audio output, use the SPDIF adjustment. If you are only using the TV speakers to get sound, use the TV Speaker adjustment. These adjustments are made in milliseconds and can make the audio output faster or slower.


Try to bypass the cable box by running the cable line (coax) directly to the back of the television. If the audio and video are still out of sync, the device may require a service call.



Home Theater System


Have you attempted to bypass the television?



Some LG televisions have an AV Sync adjustment option that could be used in this type of connection setup. If the device has this option, use the SPDIF adjustments in the audio menu of the TV to make any necessary adjustments to the sync levels. If this does not correct the issue:



Mute the TV audio


Bypass the TV by running an optical cable directly to the Cable/Satellite box to the home theater system.



If the problem still occurs, the home theater system could use excessive audio buffers and the delay is likely included during the audio encoding process. Some home theater systems have an AV Sync option that could correct this. Consult the owners manual or manufacturer of the unit for additional assistance.


If not, we recommend a direct connection from the audio source to the audio receiver whenever possible. This eliminates the need for the audio to be passed through the TV which could cause audio/video issues.


BluRay or DVD Player


Are the discs being used store bought?



Some LG televisions have an AV sync adjustment option that could be used in this type of connection setup. If the device has this option, use these adjustments in the audio menu of the TV to make any necessary adjustments to the sync levels.


If multiple discs are experiencing the audio/video sync issue, it could be because the DVD or BD player may be using excessive audio buffers and the delay could be occurring during the encoding process. Contact the manufacturer of the player for any possible audio adjustments.


Are the discs being used home made?



Some LG televisions have an AV sync adjustment option that could be used in this type of connection setup. If the device has this option, use these adjustments in the audio menu of the TV to make any necessary adjustments to the sync levels.


If the latest version of codec is not used, there may be an audio delay while playing files on the player. If this is the case you will need to contact the manufacturer of the player for software updates or further troubleshooting information.


If codec is not the issue, some movies dub the audio tracks after the video recording is complete. This could result in mismatching in the file itself.


Game Consoles


Some LG televisions have an AV Sync adjustment option that could be used in this type of connection setup. If the device has this option, use these adjustments in the audio menu of the TV to make any necessary adjustments to the sync levels.


If multiple discs are experiencing the audio/video sync issue, it could be because the game console may be using excessive audio buffers and the delay could be occurring during the encoding process. Contact the manufacturer of the game system for any possible audio adjustments.