- Why is post-rock usually instrumental?
- Because its expressive means are timbral accumulation and dynamic ascent rather than lyrical narration. A voice entering immediately becomes the focus and breaks the emotional curve the instruments are building. The few vocal examples treat the voice as another layer of texture.
- How do I get that eruption when generating?
- Write the dynamic map explicitly: "first ninety seconds clean arpeggiated guitar and brushed drums only, adding one instrument layer per section, full band entering with heavy distortion and strings at the third section." Without structural instruction you get an evenly leveled instrumental with none of the core experience.
- How does it differ from ambient?
- Ambient pursues stillness and non-change, ideally dissolving into air. Post-rock is directional — moving from quiet to eruption is its entire engine. One makes you lose track of time; the other makes you wait for the peak.