Post-rock

Post-rock uses electric guitar, bass, drums, and sometimes piano or strings, but rejects the verse/chorus form. Tempos vary widely within a single track, often from 60 BPM at the opening to 140 BPM at the climax. Vocals are typically absent or used as wordless texture. Tracks run 7-25 minutes and follow a slow additive arc — instruments layer gradually, the dynamics build for five or ten minutes to a single loud peak, and then unravel. Guitars rely on reverb, delay, and volume-pedal swells to create space rather than riffs. Production captures the dynamic range from near-silence to wall-of-sound loudness.

The form named itself in 1994 when critic Simon Reynolds applied 'post-rock' to Bark Psychosis's 'Hex.' Talk Talk's late albums ('Spirit of Eden,' 1988; 'Laughing Stock,' 1991), Slint's 'Spiderland' (1991), and Tortoise's 'Millions Now Living Will Never Die' (1996) are the predecessors. The form went international through the late 1990s and 2000s with Mogwai (Glasgow), Sigur Rós (Reykjavik), Godspeed You! Black Emperor (Montreal), Explosions in the Sky (Austin), This Will Destroy You, Russian Circles, and Japan's Mono and World's End Girlfriend. Film and TV scoring picked up the sound from the mid-2000s onward.

The build is the point — don't wait for a chorus, listen for the addition of each new layer. The crescendo from a Mogwai or Explosions in the Sky track may take eight minutes to arrive and last twenty seconds. Guitar reverb and delay create the illusion of architectural space; in headphones you can sometimes hear the room. Bass often carries the song's actual melody, since there's no vocal to do so. Drum rolls (sustained 16th-note hits across the toms) signal a transition is imminent.

Mogwai's 'Young Team' (1997) is the most direct entry point. From there, Sigur Rós's 'Ágætis byrjun' (1999), Explosions in the Sky's 'The Earth Is Not a Cold Dead Place' (2003), and Godspeed You! Black Emperor's 'F♯ A♯ ∞' (1997).

Sigur Rós's singer Jónsi performs many of the band's vocals in 'Hopelandic' (Vonlenska) — invented syllables with no semantic meaning, treated as a melodic instrument. The band has stated this is a deliberate decision so listeners can project their own meanings onto the vocals, and several songs have no lyrics in either Icelandic or English at all.