The difference, by ear
Post-rock is also instrumental and builds across long forms, with the opposite relationship to technique - it hides difficulty where this displays it.
Both are mostly instrumental, but post-rock is slower: 60 to 140 bpm against 100 to 180. To hear the difference, play Liquid Tension Experiment next to Slint. Instrumental prog metal comes from the metal side of the tree and post-rock from the rock side, and post-rock came first, by four years.
In figures
Instrumental prog metal
Where it sits
Heavy metal › Progressive metal › Instrumental prog metal
In short
No vocals: the melody is carried by guitar or keyboard, and the structure can be as complex as it likes.
How it sounds
- The melody is carried by guitar or keyboards, with no vocals.
- Long technical structures with many sectional changes.
- Clean production with every instrument separately audible.
Key acts
- Liquid Tension Experiment
- Animals as Leaders
- Scale the Summit
Start here
The pickAnimals as Leaders - the debut. Tosin Abasi plays eight strings as if it were normal.
Full page →Post-rock
Where it sits
Rock › Progressive rock › Post-rock
In short
Rock instruments used for texture and crescendo rather than for choruses. The song climbs for ten minutes and detonates once.
How it sounds
- A long crescendo: the piece starts near silence and ends in a wall of sound.
- Guitars with delay and reverb used for texture rather than riffs.
- Almost always instrumental, with pieces running eight to twenty minutes.
Key acts
- Slint
- Mogwai
- Godspeed You! Black Emperor
- Explosions in the Sky
Start here
The pickMogwai - Young Team. The closing track runs sixteen minutes and earns every one.
Full page →