- Style
- Auto lets the text decide: lyrics make a song, a brief a track. A family makes a dark-pop song, a style an electronic track.
- Flavour
- A sub-type of the style, for the seven styles that cover several scenes.
- Era
- The decade the track sounds like. Auto reads a year or decade in the first line of the brief.
- Arc
- The energy shape over time: where the piece builds, peaks and drops.
- Vocals
- Who sings, and how. A track stays instrumental unless its style or this knob asks for spoken words, chops or a sung topline.
- Topline
- How much of the text a track sings: one phrase, a two-line loop, or whole verses.
- Hook
- The phrase the track sings. Blank picks one from your text; the suggestions are the phrases that sing best.
- Delivery
- Dense, rhyming sections are rapped unless you set this to always sung. Always spoken speaks every section.
- Target length
- Sets the bar counts of the arrangement sheet, so Suno writes a full club track instead of a short loop.
- BPM
- Blank takes the style's usual tempo. BPM and key go first in the Style box.
- Seed
- Picks one variation. The same text, knobs and seed always give the same patch; Reroll tries another.
- Mutation
- How far the patch may drift from its style: 0 stays in its own palette, higher values borrow from neighbouring ones.
- Tag density
- How much detail the section tags in the Lyrics box carry, from bare to maximal.