Forma Labs Filament
Forma Labs · £149
Forma Labs Filament is a real-time orchestration plugin that hosts up to 64 instruments and turns one keyboard performance into multi-part arrangements.
A clever orchestration host for players who want live multi-instrument voicing from one performance, not a sample library and not a full DAW arranger.
Best for: Composers and live players who own many instrument plugins and want real-time multi-part orchestration from a single keyboard.
Pros
- Hosts up to 64 VST3/AU instruments inside one instance
- Real-time voice distribution, transpose, and routing matrix
- Standalone mode for live performance outside a full DAW session
- Faster sketching than manually assigning every orchestral section
Cons
- Does not include orchestral samples—you must supply instruments
- CPU cost scales with how many heavy libraries you host
- Niche workflow; overkill if you only write with one piano patch
Overview
Filament is a real-time orchestration plugin from Forma Labs: you play one keyboard part, and it distributes notes across up to sixty-four hosted VST3 or AU instruments with transpose and routing per connection. It is closer to a performance host than a sample library. The value appears when you already own strings, brass, winds, and keys and want them to respond like a live ensemble from a single performance.
It excels at sketching and live layering. Instead of drawing separate MIDI tracks for every section, you define how chords and lines fan out, then play. Standalone mode supports stage or laptop sketching without opening a full session. For media composers who think with their hands, that can beat step-time orchestration for early drafts.
The limitations are clear. Filament does not ship the orchestra—you bring Kontakt libraries, modeled instruments, or whatever else you license. Hosting many large libraries inside one instance is CPU-heavy. Chord assistants like Scaler 3 solve harmonic ideas without hosting; Kontakt alone is the library host without Filament's multi-voice performance matrix.
Choose Filament if real-time multi-instrument voicing is the missing piece in your setup. Choose Scaler or InstaChord for harmonic generation, EZkeys for piano-led songwriting, or a full template in the DAW when you need note-level control of every part. Our Filament article walks through the hosting and routing model.
Specifications
- Type
- Real-time orchestration engine / plugin host
- Hosted instruments
- Up to 64 VST3 or AU plugins per instance
- Formats
- VST3, AU, standalone
- Platforms
- macOS and Windows
- Price
- £149 regular; launch promos have offered £99
- Activations
- Up to three machines (per vendor policy at launch)
Last verified 2026-07-16
FAQ
Does Filament include orchestral samples?
No. Filament is an orchestration host and MIDI engine. You load your own VST3 or AU instruments and Filament routes and voices them in real time.
How much does Filament cost?
Forma Labs listed a regular price of £149, with a £99 launch offer that ran through mid-July 2026. Confirm current pricing on the official site.
What formats does Filament support?
VST3, AU, and standalone on macOS and Windows.
Direct competitors
Forma Labs Filament vs — head-to-head specs, price, and Dubspot Score.