Phrasing · Workbench
Riff development — one idea, built into a song
Every riff-based song is the same riff, put through a small number of honest moves. Below is the ledger of those moves, then a transformer that runs the real arithmetic on a riff you type in — no audio, no invented notes, just the exact shape before and after.
Once you've reshaped a riff, send it to the forge to hear it in a genre, or fuse it with a second style entirely.
The ledger
Ten moves, sortable
The standard motivic-transformation toolkit composers have used since well before Liszt and Berlioz systematised it — reach for one deliberately, rather than by accident.
| Move | What changes | What stays | When to reach for it |
|---|---|---|---|
| Sequence | Pitch level — the whole shape is transposed by a fixed interval. | The exact contour and rhythm. | To build momentum by restating the idea at a new pitch, right away, within the same phrase. |
| Inversion | The direction of every interval — up becomes down and vice versa. | The size of each interval, and the rhythm. | To answer a rising idea with a falling one (or the reverse) without introducing new material. |
| Retrograde | The order of the notes — played back to front. | The exact pitches and durations used. | Sparingly, as a deliberate mirror-image gesture — it rarely sounds like a natural next phrase, so use it when you want that noticed. |
| Modulation | The tonal centre the riff is heard against — the surrounding harmony moves to a new key. | The riff's own internal shape (the arithmetic is identical to a sequence). | To lift a chorus, bridge or final repeat by shifting the whole song up, not just the riff. |
| Augmentation | Note durations — stretched, typically doubled. | The pitches and their order. | To turn a fast verse riff into a spacious theme — a classic way to make an idea feel like a climactic outro. |
| Diminution | Note durations — compressed, typically halved. | The pitches and their order. | To turn a slow theme into a driving variation — often used to build energy into a chorus or solo. |
| Fragmentation | Length — only a short cell from the original idea survives. | That fragment's exact pitches and rhythm. | To develop a riff by isolating its most memorable notes and repeating or sequencing just that cell. |
| Extension | Length — the phrase is prolonged, e.g. by repeating itself. | The original material, simply continued. | To stretch a short idea into a longer passage without inventing new content. |
| Truncation | Length — the tail of the phrase is cut short. | The beginning of the original material. | For a sudden, clipped ending — a hard stop instead of a full resolution. |
| Rhythmic displacement | When the idea starts relative to the beat — shifted off the downbeat. | Every pitch and every interval, completely unchanged. | To make a repeated riff feel different the second time without changing a single note — pure syncopation. |
10 moves · tap "Move" to sort A–Z · grounded in the classical motivic-transformation toolkit (sources below).
Try it
The riff transformer
Type a short riff as scale degrees (e.g. 1 3 5 6 5 3) or fret numbers on one string (e.g. 0 2 3 2 0). Pick a move. The chart redraws with your original in grey and the transformed line in black — pure arithmetic, computed on this page.
The transformer treats your numbers as a pure sequence: it does not know or guess your key or scale, so sequence/modulation add a fixed amount to every value rather than force-fitting a diatonic scale. That keeps every result correct for whatever numbering you used — scale degrees or frets alike.
Sources
- Hugh MacDonald (ed. Stanley Sadie), “Transformation, thematic,” The New Grove Dictionary of Music and Musicians, 2nd edition (Macmillan, 2001) — the standard reference definition of thematic/motivic transformation (permutation, inversion, retrograde, augmentation, diminution, fragmentation) and its history from Beethoven and Schubert through Liszt and Berlioz.
- Rudolph Reti, The Thematic Process in Music (Macmillan, 1951) — the classic full-length study of exactly these transformation techniques across the tonal repertoire.
- Fender Play / Fender articles on technique — baseline vocabulary for how these moves are executed on guitar specifically (see the articulation & expression page for the full technique citations).
FAQ