Filament review
A focused MIDI host for routing, revoicing and orchestrating instruments in a DAW.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Filament is a MIDI orchestration plugin and standalone application for composers, producers and sound designers who want to route instruments and generated MIDI from a keyboard. It hosts up to 64 AU or VST3 instruments in a single DAW track, and routes up to 8 input voices to as many as 64 output rows. Per-connection transpose controls, chord revoicing and keyswitch-based configuration switching support more involved instrument setups. That focus makes it relevant to keyboardists managing multiple sounds or articulations, rather than users looking for a general-purpose audio-effects plugin.
Its feature set extends beyond routing: Filament includes a phrase arpeggiator, MIDI clip launcher, smart modifier and articulation trigger, along with a mixer, macros and presets. Generated MIDI can go to a DAW, external ports, recordings or MuseScore. The standalone app offers an option outside the AU/VST3 plugin formats, while MuseScore is the named integration. The breadth suits workflows centered on shaping and directing MIDI; buyers seeking a broad ecosystem of integrations or audio processing should look elsewhere.
According to the vendor's pricing information, Filament costs £149 as a one-time purchase, with a full license for up to 3 machine activations and a 14-day money-back guarantee. It is available for macOS and Windows, with email and documentation support. There is no free plan, so the purchase is best considered by people who need its specialized hosting and orchestration tools. Keyboardists who can make use of voice routing, revoicing, articulation controls or MIDI output may find the single-purpose design a fit; those needing a general effects suite or a free starting point should choose an alternative.
Filament pros and cons
- Where it wins
- Hosts up to 64 AU/VST3 instruments within a single DAW track
- Routes up to 8 input voices to 64 output rows with per-connection transpose
- Includes chord revoicing, arpeggiation, clip launching and MIDI output
- Where it doesn't
- Paid license starts at £149 as a one-time purchase
- Focused on MIDI and instrument orchestration, not general audio effects
- Available only on macOS and Windows
Filament fact sheet, pricing and score →
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