Descent20071080pblurayh264aac

While many physical discs used DTS or Dolby Digital, the AAC format became the gold standard for high-quality, compressed digital audio. In a movie where sound design—the dripping of water, the scuttle of claws, and the echoes of screams—is a character in itself, this audio format ensured a 360-degree immersive experience. A Masterclass in Psychological Horror

: H.264 (AVC), a standard high-efficiency compression used for most Blu-ray releases to maintain visual quality while managing file size. Audio Codec

Note that this 2007 film is distinct from the 2005 horror film The Descent