FilterSolo

Name: FilterSolo
Price: 20.33 USD
Author: HoRNet

by HoRNet · Filter · Resonant multimode filter with modulation

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FilterSolo is a resonant digital filter with low-pass, high-pass, band-pass and band-stop modes at 12 or 24 dB/oct, plus analog saturation and hiss.

Two envelope followers and two tempo-synced LFOs can push cutoff and resonance in either direction. It costs €17.90 (about $20.33).

Best for: Keys & Synths, Drums, Guitars, Sound Design. Genres: Electronic & EDM, Hip-Hop & Trap, Lo-Fi.

Keywords: tempo-synced, analog-sounding, drums, rhythmic, electric guitar, bass, hardware emulation, lo-fi, mixing, modulation matrix, sound design.

What it does

FilterSolo is HoRNet's single multimode filter effect, which the developer describes as "a resonant filter with a variety of modulation possibilities and analog emulation." It is built for sweeps, auto-wah and rhythmic movement rather than corrective filtering.

Filter modes: low-pass, high-pass, band-pass and band-stop.
Slopes and range: 12 or 24 dB/oct, with cutoff from 20 Hz to 20 kHz and a resonance control that can emphasise the peak.
Envelope followers: two, each with attack and release from 10 ms to 1 s, for level-driven sweeps and auto-wah.
LFOs: two, tempo-syncable, each with four waveforms.
Modulation: envelopes and LFOs can push cutoff and resonance up or down (positive or negative amounts).
Analog character: saturation and hiss that can be switched off separately.
Display: a large LCD-style screen showing cutoff, resonance and LFO settings.

The current macOS version is 1.2.0; KVR lists version 1.1.3 for Windows. The demo silences now and then and does not save settings or respond to automation.

Source: HoRNet product page

When to use it

FilterSolo is a cheap single-filter effect with enough modulation for most sweep and wah jobs. Compared with Soundtoys FilterFreak it covers similar ground, an analog-style resonant filter driven by LFOs and envelope followers, at a fraction of the price, but without its extra rhythm and character options. Next to FabFilter Volcano 3 it has one filter instead of several, and no flexible routing or modulation matrix. It is more of a general modulated filter than Cytomic The Drop, which focuses on detailed analog filter models.

Best for: filter sweeps, envelope-driven wah on drums, bass or guitar, and tempo-synced rhythmic movement.
Genres: electronic, hip-hop and lo-fi.
Look elsewhere if: you want several filters with flexible routing (Volcano 3), or deep rhythmic filter sequencing (Sugar Bytes WOW2).

Where to buy

HoRNet: $20.33 (Listed at €17.90; converted at €1 = $1.1355 (ECB rate, 29 Sep 2026))

Tutorials and reviews

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