This Mortal Coil - strength of strings, 1986

"Beginning with a dual acoustic/electric guitar riff with an insistent, distinctly Native American texture, other instruments gradually join, as though awakened by, and compelled to replicate, the notes. Drums and bass soon enter, accentuating the final notes of the pattern, as if to gently presage the thundering climax of the song still some minutes away. But the pattern resumes; and each time it is repeated, the song’s intensity rises. An eerie chorale enters in the next cycle, interpreting the riff as hypnotic tribal chant."