DTS-HD Master Audio, as technology People & Technology

DTS-HD Master Audio is a lossless audio codec used on Blu-ray and UHD Blu-ray discs. It delivers bit-for-bit identical audio to the studio master — no data is discarded during encoding. The format supports up to 7.1 channels at sample rates up to 96 kHz and bit depths up to 24-bit. A lossy DTS core is embedded for backward compatibility with players that cannot decode the lossless extension.

On catalog film releases, DTS-HD MA is the standard lossless audio format. It appears in two common configurations: a 2.0 stereo track preserving the original theatrical mix (often a Dolby Stereo matrix), and a 5.1 surround track that may be either the original multi-channel mix or a later upmix.

In the wiki

Film	Page	Summary
Invasion of the Body Snatchers (1978)	Scream Factory Blu-ray (Invasion of the Body Snatchers)	DTS-HD MA 2.0 (original Dolby Stereo) and DTS-HD MA 5.1 upmix; reviewers split on which to prefer
Invasion of the Body Snatchers (1978)	Kino Lorber 4K UHD (Invasion of the Body Snatchers)	DTS-HD MA 5.1 and 2.0; every reviewer preferred the stereo track
Blow Out (1981)	Physical Media Releases (Blow Out)	DTS-HD MA 2.0 on both 2011 and 2022 Criterion editions; no Atmos remix despite the film's sound-design subject matter
Outland (1981)	Physical Media Releases (Outland)	2012 Warner Blu-ray offered DTS-HD MA 5.1 only; original stereo not included until Arrow's 2025 4K UHD (as LPCM 2.0)