This appendix is the single-source lookup for every parameter in Poly. Parameters are grouped by category; internal parameter IDs are listed where applicable for preset authors and automation mapping.
Each of the 8 lanes exposes the following parameters. Lane-scoped parameter IDs are computed as lane * 16 + offset (expression parameters) and 800 + lane * 10 + offset (core parameters).
| Parameter | ID Offset | Range | Default | Description |
|---|
| Steps | core 0 | 1 - 64 | 4 | Cycle length in steps |
| Subdivision | core 1 | 1, 2, 4, 8, 16 | 4 (1/4 note) | Step grid resolution: 1=whole, 2=half, 4=quarter, 8=eighth, 16=sixteenth |
| Hits | core 2 | 0 - 64 | 4 | Number of active hits per cycle (Euclidean distribution) |
| Rotation | core 3 | 0 - 63 | 0 | Pattern rotation offset |
| MIDI Note | core 4 | 0 - 127 | 36 | GM drum note assignment |
| Cell Count | core 5 | 0 - 64 | 0 | 0 = standard Euclidean; >0 = additive cell mode (aksak) |
| Timeline | core 6 | Off / On | Off | Use fixed pattern instead of Euclidean distribution |
| Pattern Length | core 7 | 0 - 64 | 0 | 0 = use Steps value; >0 = explicit timeline length |
| Tempo Mult | core 8 | 0.25x - 4.0x | 1x | Per-lane tempo scaling (Nancarrow-style) |
| MIDI Channel | core 9 | -1 to 15 | Auto | -1 = lane index as channel; 0–15 = explicit MIDI channel |
| Fill Every N | core 10 | 0 - 64 | 0 | |
| Seed Lock | core 11 | Off / On | Off | |
| Kotekan Mode | core 12 | nyog cag / telu / empat | nyog cag | |
| Kotekan Overlap | core 13 | 0 - 64 | 0 | |
| Parameter | ID Offset | Range | Default | Description |
|---|
| Probability | 0 | 0.0 - 1.0 | 100% | Chance each note triggers per cycle |
| Base Velocity | 1 | 0 - 127 | 100 | Default MIDI velocity |
| Emphasis | 2 | 0.0 - 1.0 | 50% | Probability of accented hits |
| Ghost Floor | 3 | 0 - 127 | 30 | Minimum velocity for ghost notes |
| Spread | 4 | 0.0 - 1.0 | 5% | Random velocity variation around base velocity |
| Swing | 5 | 0.0 - 1.0 | 0% | Swing feel (delays alternate steps) |
| Humanize | 6 | 0 - 50 | 0 | Random timing jitter per note |
| Duration | 7 | 0 - 4 | 0 | MIDI note-off duration in beats |
| Active | 8 | Off / On | On | Enable or disable the lane |
| Phrase Len | 9 | 0 - 968 | 0 | Phrase gating period in beats; 0 = no gating |
| Phrase Gap | 10 | 0 - 968 | 0 | Silence between phrases in beats |
| Phrase Offset | 11 | 0 - 968 | 0 | Phase offset for this lane’s phrase cycle in beats |
| Mutation | 12 | 0.0 - 1.0 | 0% | Per-step random pattern variation each cycle |
| Drift Rate | 13 | -4.0 to +4.0 steps/bar | 0 | Phase drift speed (Reich phasing) |
| Timing Offset | 14 | -20 to +20 ms | 0 | Fixed per-lane timing offset (positive = late) |
| Kotekan Source | 15 | -1 to 7 | Independent | -1 = independent; 0–7 = complement source lane |
The Cell Count, Timeline, and Fixed Pattern Length params live in the Core table above. The two entries here are state-only fields (not exposed as VST3 params) that supplement them.
| Parameter | Range | Default | Description |
|---|
| Cell Sizes | Array of ints | [] | Subdivision units per cell (e.g., [2,2,3] for 7/8) |
| Fixed Pattern | Array of booleans | [] | Per-step on/off for timeline mode |
| Parameter | Range | Default | Description |
|---|
| Syncopation Offset | 0.0–1.0 | 0.0 | Push strong-beat steps late |
| Micro-Timing | -20 to +20ms per step | 0ms | Per-step timing offset array |
Each lane supports up to 4 envelope assignments (kMaxEnvelopesPerLane = 4). Envelopes modulate lane parameters over time, phase-locked to transport position.
| Parameter | Range | Default | Description |
|---|
| Target | Velocity, Density, Probability, AccentBias, NoteLength, TimingLooseness, ActivationWeight, FillLikelihood | Velocity | Which parameter the envelope modulates |
| Shape | Ramp, Sine, Triangle, Curve, StepList | Sine | Envelope waveform |
| Depth | 0–100% | 100% | Modulation depth |
| Period | 0.25–64 bars | 4 bars | Envelope cycle length in bars |
| Phase Offset | 0–100% | 0% | Initial phase offset |
| Curvature | -1.0 to 1.0 | 0.0 | Shape curvature bias (Curve shape only) |
| Step Values | Array of floats (max 16) | [] | Per-step levels (StepList shape only) |
| Active | On / Off | On | Enable or disable this envelope slot |
Macros apply broad-stroke adjustments across all lanes simultaneously.
| Parameter | ID | Range | Default | Description |
|---|
| Complexity | 200 | 0–100% | 50% | Rhythmic intricacy across all lanes |
| Density | 201 | 0–100% | 50% | Active hit count per cycle |
| Syncopation | 202 | 0–100% | 0% | Emphasis shift away from strong beats |
| Swing | 203 | 0–100% | 0% | Global swing feel |
| Tension | 204 | 0–100% | 0% | Rhythmic unpredictability and conflict |
| Humanize | 205 | 0–100% | 0% | Global timing and velocity imperfections |
| Parameter | ID | Range | Default | Description |
|---|
| Scene Select | 500 | A / B / Morph | A | Active scene (3-way: 0=A, 1=B, 2=Morph) |
| Morph Amount | 501 | 0–100% | 0% | Blend between Scene A and Scene B |
| Parameter | ID | Range | Default | Description |
|---|
| Chain Enable | 510 | On / Off | Off | Activate automated scene sequencing |
| Chain Mode | 511 | OneShot / Loop / PingPong | OneShot | Behavior at end of sequence |
| Chain Length | 512 | 1–16 | 1 | Number of entries in the chain |
| Entry N Scene | 520 + N*2 | A / B / Morph | A | Scene for entry N |
| Entry N Bars | 521 + N*2 | 1–32 | 4 | Duration of entry N in bars |
| Parameter | ID | Range | Default | Description |
|---|
| Active Lane Count | 300 | 1–8 | 4 | Number of active lanes |
| Seed | 301 | 0–999999 | 0 | Random seed for pattern generation |
| Selected Lane | 700 | 0–7 | 0 | Currently selected lane in the UI |
| Parameter | ID | Range | Description |
|---|
| Export Trigger | 600 | Button | Initiates capture-to-file |
| Capture Length | 601 | 1–32 bars | History window for export |
| Capture Ready | 602 | Read-only | Indicates export buffer is complete |
| Capture Event Count | 603 | Read-only | Number of events in the capture buffer |
These parameters are written by the engine for UI display; they are not user-editable.
| Parameter | ID | Description |
|---|
| Velocity Output (per lane) | 400–407 | Last-triggered velocity for lane 0–7 |
| Lane Phase Output (per lane) | 420–427 | Current cycle phase for lane 0–7 |
| Envelope Value Output (per lane) | 430–437 | Current envelope modulation value for lane 0–7 |
| Phrase Phase Output (per lane) | 440–447 | Current phrase cycle phase for lane 0–7 |
| Transport PPQ | 450 | Current transport position in PPQ |
The Note Map is a 128-entry remapping grid at the scene level. Each MIDI note (0–127) maps to a destination note. Default: identity mapping (note N maps to note N). Applied globally to all lane output after channel assignment.
For the musical context and application of each parameter, see the relevant chapters. For factory preset configurations, see the Preset Reference appendix.