FabFilter Simplon is a streamlined dual-filter plugin offering two multimode filters with three characteristics each, serial/parallel routing, and an interactive display for quick, creative filtering.
Purpose
Simplon is a streamlined dual-filter plugin from FabFilter, designed as a simplified version of Volcano 3. It provides two independent multimode filters that can be configured in serial or parallel, making it a versatile tool for sound design and mixing.
Each filter offers low-pass, high-pass, and band-pass responses with slopes of 12, 24, or 48 dB/octave. The filters are engineered for smooth self-oscillation, delivering a raw but polished sound. With three distinct filter characteristics per filter, users can access a wide palette of tonal colors.
Key Capabilities
The plugin features a large interactive display showing both filter curves, which you can drag to adjust parameters individually or simultaneously. This visual approach simplifies tweaking, making it intuitive for live performances or studio work. The display is supported by a low-latency interface with large controls.
Simplon includes FabFilter’s signature fine-tuned knobs that support vertical and circular drag modes. It also offers interactive MIDI Learn, Smart Parameter Interpolation for smooth transitions, and sample-accurate automation for all parameters. Undo/redo functionality and a preset browser enhance workflow efficiency.
Workflow
In a mix, you might use Simplon to shape individual tracks or buses with subtle filtering. Set two filters in parallel to blend low-pass and high-pass responses for creative frequency splits. The three filter characteristics let you choose between gentle overdrive or aggressive self-oscillation, offering flexibility for both corrective and creative tasks.
The interactive display allows quick adjustments without menu diving, which is useful for live tweaking. MIDI Learn and Smart Parameter Interpolation facilitate dynamic changes, while sample-accurate automation ensures precise, repeatable filter sweeps in a DAW. The presets and help hints lower the learning curve for new users.
Practical Applications
Simplon excels in sound design tasks like creating sweeps, risers, or unique tonal shifts. Its self-oscillating filters can generate raw, characterful tones suitable for electronic music or experimental production. The serial and parallel modes allow complex routing, from simple Eq-style cuts to multi-band effects.
For mixing, you can use it to tame harsh frequencies or add warmth with gentle resonance. The 48 dB/octave slope is ideal for aggressive filtering, while lower slopes offer more gentle shaping. Whether used on vocals, synths, or drums, Simplon provides a straightforward, hands-on approach to filtering.
Key features
- Two multimode filters with low-pass, high-pass, and band-pass responses
- Three filter characteristics per filter for varied tonal color
- Slopes of 12, 24, and 48 dB/octave
- Serial and parallel filter routing
- Large interactive filter display with drag control
- MIDI Learn, Smart Parameter Interpolation, and sample-accurate automation
- Undo/redo, preset browser, and extensive help hints
Best for
Simplon is best for producers and sound designers who need a straightforward, high-quality filter plugin for creative frequency shaping, live tweaking, and adding analog-style character to individual tracks or mix buses. Its simplified design makes it accessible for quick edits, while retaining enough flexibility for complex routing.