Television Audio FAQs

Television Audio FAQs regarding SAP, VDS, and MTS

What is SAP?

SAP is an acronym for Separate Audio Program. This has traditionally been used for second language broadcasts such as Spanish.  Recently it is being used by the networks for VDS as well.

What is VDS?

VDS is an acronym for Video Descriptive Service which is an additional audio service provided to the home for the blind or visually impaired. It is a mix of the program content (dialogue, sounds effects and music) with additional dialogue that describes what is happening on-screen (when there is no dialogue in the program audio.)

What is MTS?

MTS is an acronym for Multichannel Television Sound. This is typically the nomenclature that you would see on an older TV set or a newer TV set when tuning analog channels. This is how you select between the main audio program and the SAP.

Beginning July 2nd, 2013, we will no longer be inserting a stereo down mix of the main audio surround sound into the SAP/VDS channels. This could be a problem for some viewers who have unknowingly set their TV to listen to the SAP or MTS audio. Until now, viewers may not have known the difference since the same audio has been provided with that service. However, now viewers will not hear any audio on their TV unless the program supplier, either syndicator or network, has specifically provided audio for that service. If you cannot hear our programming, you may need to slect the main channel audio on your TV set.

For a list of upcoming programs, click here.

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