The process of combining 5 or more discrete digital audio signals into 2 channels.

Generally, the process of combining several channels of information into a smaller number of channels. Specifically, a feature of some Dolby Digital playback devices, allowing users to convert the multichannel digital audio into a two-channel Dolby ProLogic compatible signal ( Lt, Rt), or a stereo signal, or a mono signal. In all of these downmixes the LFE channel is not included, therefore the downmixed signals are not exactly the same as the original. See: Dolby Digital, LFE, Lt, Rt.

To convert a multichannel audio track into a two-channel stereo track by combining the channels with the Dolby Surround process. All DVD players are required to provide downmixed audio output from Dolby Digital audio tracks.

The process of converting a multi-channel audio track to two- or one- channel track

To automatically extract a stereo or mono mix from an encoded surround mix.

A system’s ability to play mono, stereo or multi-channel surround sound from an encoded soundtrack.