“Sound of Freedom,” a religious thriller led by “The Passion of the Christ” star Jim Caviezel, is becoming an unlikely box office savior. “Sound of Freedom” opened last Tuesday, generating a mighty $14.2 million on the Independence Day holiday. It’s playing in 2,850 North American theaters, a smaller footprint than “Insidious” and “Indiana Jones (3,188 theaters and 4,600 theaters, respectively). “Sound of Freedom” looks to eclipse those box office returns in a matter of days, as long as momentum sustains during the week. “Such content can indeed find an enthusiastic audience, generate solid box office and impressive profits for their investors.”