filamentdocs
By the Forma Labs teamUpdated March 2026
The Smart Modifier maps incoming MIDI values — note-on velocities or continuous controllers — through custom curves before they reach the hosted instrument.
What It Does
Each output row has a Smart Modifier with multiple channels, each applying an independent curve.
Note-On Modifier
Reshapes note velocity before the note is sent. Use this to compress dynamics, add soft-touch sensitivity, or create consistent velocity across the range.
Controller Modifier
Intercepts a specific CC number and remaps its value through the curve. Transform linear fader movements into exponential response, or invert CC directions.
MIDI VCA Channel
Uses one CC to scale (modulate) another modifier channel's output. This allows a mod wheel sweep to control the intensity of velocity scaling dynamically.
The Curve Editor
Navigate to the CC Modifier page. The curve is displayed as a graph:
- •X axis: Input value (0–127)
- •Y axis: Output value (0–127)
- •Click: Add nodes
- •Drag: Adjust the shape
The curve is evaluated as a spline and stored as a 128-point lookup table for zero-latency processing.
Examples
Velocity S-Curve
An S-curve on a note velocity modifier gives soft notes more dynamic responsiveness while keeping loud notes consistent. Ideal for expressive string patches.
Expression Scaling with VCA
A VCA channel linked to expression (CC 11) allows a mod wheel sweep to scale string dynamics without the full curve reaching maximum — subtle, controlled swells.
CC Compression
Create a curve that compresses the upper range of CC values, preventing harsh transitions when pushing faders to maximum.
Taming a Section
Use the Smart Modifier to balance sub-sections of your orchestration. Aggressive brass samples can be tamed by compressing their velocity curve—full-force playing comes through at a more reasonable level without losing responsiveness. Similarly, a solo violin that's too prominent in the chorus can have its velocity scaled down on that keyswitch while keeping it forward in the verse.
Per-Keyswitch Dynamics
Each keyswitch can have different Smart Modifier curves. Use this to bring out a lead instrument in one section while tucking it back in another—the same notes, different balance per orchestration state.