SHAPE — Quick Reference
SHAPE (Melodic Shape System) — Quick Reference
AMF Role: The Lead Voice — Melodic Speech | Layer: 7
PDC Melody Checklist
- Perceive: Is melody needed? What register is open? What phrase just happened?
- Diagnose: Does the music need an answer, lift, release, hook, fill, contrast, or silence?
- Contribute: Use the smallest useful phrase.
The SHAPE Model
| Element | Question | Practical action |
|---|---|---|
| Seed | What is the tiny starting idea? | Choose 2–3 notes maximum |
| Horizon | Where is the phrase going? | Name the target tone; land on a strong beat |
| Arc | What is the phrase shape? | Choose one contour type |
| Pulse | What is the rhythmic identity? | Assign a rhythm cell |
| Evolution | How does the idea develop? | Apply one development operation |
| Breath | Where is the space? | Leave a full bar after each phrase |
Shape Archetypes and Emotional Affect
| Contour | Direction | Emotional tendency | Tight version | Wide version |
|---|---|---|---|---|
| Ascending | Up | Energy, tension, aspiration | Gradual rise | Leaping urgency |
| Descending | Down | Release, resolution, settling | Step-by-step landing | Decisive drop |
| Arch | Up then down | Completion, narrative journey | Intimate statement | Big declaration |
| Valley | Down then up | Introspection, gathering energy | Searching, questioning | Bold recovery |
| Stationary | Repeated / plateau | Insistence, authority, blues weight | — | — |
Tight = small intervals (steps and small skips)
Wide = larger leaps
Space is Part of the Shape
Silence after a phrase is not absence — it is structure. Every phrase ends with breath. The last note does not end the phrase; the listener's receipt of it does.
Practice rule: Every phrase must be followed by at least one bar of deliberate silence before the next phrase.
The BB King Principle
Note weight > note quantity.
Three notes with timing, duration, touch, and space beat thirty notes that are technically correct but emotionally empty.
When uncertain: play less.
Motif Development Operations
| Operation | Description | In practice |
|---|---|---|
| Repeat | State the seed again | Creates identity |
| Answer | Respond with a related gesture | Call-and-response |
| Sequence | Transpose the seed up or down | Idea travels to new pitch |
| Fragment | Develop only part of the seed | Smaller idea, more focus |
| Rhythmic Change | Same pitches, different rhythm | Changes the time feel |
| Inversion | Flip the interval direction | Arch becomes valley |
| Augmentation | Double the note values (stretch) | Slows the idea |
| Diminution | Halve the note values (compress) | Speeds the idea |
| Chromatic Approach | Approach target from semitone above/below | Adds jazz language |
Three-pass rule: State → One change → One more development. Then stop.
Target Tone Quick Map
| Chord type | Best targets | Most characteristic |
|---|---|---|
| Major | Root, 3rd, 5th, maj7 | 3rd |
| Minor | Root, b3, 5th, min7 | b3 |
| Dominant | Root, 3rd, b7 | b7 (or 3+b7 tritone) |
| Blues context | b3, b5, b7 | b3 against major harmony |
Density Levels
| Level | Description | Use when |
|---|---|---|
| Low | Single notes, long silences, short answers | Form opening; another layer is prominent |
| Medium | Short phrases with space between | Default working density |
| High | Fuller phrases, more frequent, less space | Climactic moments; bars 9–10 of 12-bar |
Imaginary vocalist: If a vocalist were present, would you be crowding them? Let that answer calibrate your density.
SHAPE Decisions Checklist
Before playing:
- Have I listened long enough to know what is needed?
- Do I have a seed (not a scale)?
- Do I have a Horizon (target tone on a strong beat)?
- Have I chosen a contour type?
- Do I have a rhythm cell for this phrase?
- Am I ready to leave space after the phrase?
Practice Prompts
Contour isolation: Play the same 3-note seed with five different contour types. Record each.
Space practice: After every phrase, leave a full bar of silence. If silence feels wrong, that is the thing to practice.
One-phrase constraint: One seed. One target. One rhythm cell. One development operation. One breath. Stop.
Density modulation: Play one chorus at low density only. Then one at high density. Then find the middle.
Seed-before-scale: Before playing over any chord, choose the seed. Name the Horizon. Then play.
Listening References
| Principle | Reference |
|---|---|
| Note weight, space | BB King — "The Thrill Is Gone" |
| Space as structure | Miles Davis — "So What" |
| Phrase authority | Louis Armstrong — "West End Blues" |
| Motivic simplicity | Thelonious Monk — "Blue Monk" |
| Target-tone clarity | Charlie Parker — "Now's the Time" |
Definitions of Done
| Level | Checkpoint |
|---|---|
| 1 — Seed/Horizon | Phrase has a seed; Horizon lands on strong beat; singable before playing |
| 2 — Contour | Can deliberately use all five contour types; can distinguish tight from wide |
| 3 — Rhythm/Space | Any seed practiced with 3 rhythm cells; silence is deliberate, not accidental |
| 4 — Development | Can apply 5 of 8 operations; three passes feel developed not random |
| 5 — PDC Integration | PDC diagnosis before every phrase; three density levels in one chorus |