Since this is the 2000 release in 1080p, it uses an older film transfer.
Here is the critical technical breakdown and troubleshooting guide for that specific release: O.Brother.Where.Art.Thou.2000.1080p.BluRay.DDP5...
The "Soggy Bottom Boys" tracks, including I Am a Man of Constant Sorrow , place George Clooney's (voiced by Dan Tyminski) lead vocals squarely in the center channel. Meanwhile, the backing harmonies swell across the left and right speakers. Since this is the 2000 release in 1080p,
Let me know which direction you’d like to take. Let me know which direction you’d like to take
Perhaps the most lasting impact of the film is its soundtrack, produced by T Bone Burnett. It triggered a massive resurgence of interest in bluegrass, gospel, and country music. The Soggy Bottom Boys
: Big Dan Teague (John Goodman), a one-eyed, predatory Bible salesman. The Blind Prophet