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Post-rock
Rock instrumentation used for long-form dynamic arcs instead of riffs, hooks and verses.
What changes versus the parent genre
Rock and metal prompts are riff-first and section-based: a hook, a chorus, a solo. Post-rock removes almost all of that. There is usually no chorus, often no vocal, and the guitar is a texture generator rather than a riff machine. What replaces the hook is a dynamic arc — a long, patient build from near-silence to a saturated peak, then a release.
So the prompt shifts from tone-and-riff vocabulary to shape-and-time vocabulary. Instead of "crunchy riff, driving drums", you write clean delay-soaked guitar arpeggios, builds slowly over three minutes into a distorted crescendo, then falls away. Everything else — amp tone, kit, bass — supports that trajectory.
| Dimension | Rock & metal | Post-rock |
|---|---|---|
| Central idea | Riff or hook | Dynamic arc |
| Form | Verse / chorus | Continuous build and release |
| Guitar role | Riffs and solos | Delay and reverb textures, tremolo picking |
| Vocals | Lead vocal | Usually instrumental or buried |
| Length | 3–4 minutes | 5–9 minutes, slow development |
| Mix | Loud and consistent | Wide dynamic range, quiet passages kept quiet |
Sound and palette
Guitars dominate but mostly through effects: clean guitar with long dotted-eighth delay, tremolo-picked lines drenched in reverb, ebow sustain, volume-swell chords, reverse-reverb swells. The heavy section usually arrives as layered distortion and feedback rather than a palm-muted riff.
Supporting colours widen the palette beyond a rock band. Strings — often a cello or a small section — carry countermelodies. Piano or glockenspiel marks the quiet passages. A synth pad or drone underpins the whole piece. Brass appears at the peak in the more cinematic corner of the genre. Bass should be melodic, not just root notes; it often carries the actual tune during quiet sections.
- Clean guitar with dotted-eighth delay — the genre's core texture.
- Tremolo picking for the crescendo.
- Volume swells and ebow for pad-like guitar.
- Cello or small string section for countermelody.
- Glockenspiel, piano or bells to mark the quiet sections.
- Drone or pad underneath the whole arc.
Rhythm, tempo and structure
Tempos sit in a moderate band — roughly 80–140 BPM — but the perceived energy is controlled by subdivision and density rather than speed. A piece at 96 BPM can move from sparse half-note guitar swells to sixteenth-note tremolo and feel like it doubled in tempo. Irregular metres (5/4, 7/8) are common and worth naming if you want that unsettled feel.
Structure is the most important thing to write into the prompt because there is no chorus to anchor it. Give the model an explicit trajectory: sparse clean intro, drums enter at one minute, layers add gradually, distorted peak with tremolo guitars, then drops back to a single guitar. Post-rock prompts that omit this end up as a static clean-guitar loop.
Production and pitfalls
Production should preserve dynamics: wide dynamic range, quiet passages stay quiet, natural room drums, huge reverb on the peak, lightly compressed, not loudness-maximised. Stereo width is a genre feature — layered guitars panned hard, with the bass and kick centred.
Common failures: requesting a crescendo but not saying what starts sparse; loading the prompt with distortion words so the piece is loud from bar one; adding a lead vocal, which converts the piece into alternative rock; and asking for a short track, which leaves no room for the arc the genre is built on. Three minutes is the practical minimum; five or more is better if the platform allows.
- Always describe the starting point, not only the peak.
- Say instrumental unless you want a buried, wordless voice.
- Avoid chorus, hook and drop vocabulary.
- Ask for wide dynamic range explicitly.
- Give the piece enough length to develop.