downmix
Downmix is the process of converting an audio signal with more channels into a lower-channel configuration, most commonly from multichannel formats such as 5.1 or 7.1 surround to stereo or mono. It is used to ensure compatibility with playback systems that do not support the original channel count and to provide a usable listening experience across a range of devices and formats.
The technique relies on a downmix matrix, a set of linear coefficients that determine how much of
There are variations for different targets, such as stereo and mono downmixes, and some systems apply perceptual
Quality considerations include managing phase relationships, preserving sense of space, and avoiding artifacts in loudness or