The "Special" edition of the soundtrack includes a vast array of instrumental tracks (BGM) that build the drama's intense psychological atmosphere. Composed by artists like , Park Yoon-seo , and Lee Joon-wha , these pieces are often characterized by their eerie, discordant, or suspenseful arrangements.
A standout feature of the Blind OST is its cohesion. Unlike many soundtracks that feel like a disparate collection of singles, this album operates as a single composition that mirrors the drama's pacing. The transition from high-stakes vocal anthems to desolate instrumental voids ensures that the listener remains immersed in the "infernal grasp" of the story's mystery.
The soundtrack's primary vocal tracks provide specific emotional entry points into the story:
: The titular track emphasizes the theme of obscured truth and the literal and metaphorical "blindness" of the justice system.
: Tracks like "An Old Wound" and "Lonely" offer rare moments of quiet sadness, grounding the thriller elements in the characters' personal pain. Narrative Cohesion
: A powerful rock ballad that captures the desolation and struggle of characters lost in a web of past trauma.
: A track that delves into the duality of identity and the facades maintained by the various suspects. Instrumental Score and Psychological Tension
: Tracks like "Inference," "Tracking," and "Evidence" use repetitive, driving rhythms to simulate the investigative process.