A resonant filter for moving sounds

HoRNet FilterSolo is a resonant filter with a variety of modulation possibilities and analog emulation, making it a perfect creative tool for sound shaping and design. Its flexibility, sound quality, and rich features allow it to be a key plugin for any producer or sound designer looking to add movement and character to their audio.

The core of FilterSolo is a high-quality digital filter model, which integrates both analog front-end and back-end emulation. When you apply a hot signal to the input and keep the analog emulation active, you’ll hear it distort in the same way that a solid-state unit would, adding warmth and character to the sound. This effect can help you craft everything from subtle tonal changes to aggressive saturation.

Filter Types and Key Controls

FilterSolo offers four different filter types that allow you to shape your sound to fit any production need:

  • Low pass: This filter cuts off frequencies above the set cutoff point, leaving only the lower frequencies to pass through. It’s perfect for creating smooth, rounded tones and eliminating unwanted high frequencies.

  • High pass: The high pass filter removes low frequencies, letting through higher ones. It’s ideal for removing rumble or unwanted low-end noise and is often used to clean up a mix.

  • Band pass: This filter allows a specific range of frequencies to pass through, while attenuating frequencies both above and below this range. It’s perfect for creating effects with a narrow frequency focus.

  • Band stop: The band stop filter works the opposite of a band pass, removing a specific range of frequencies while keeping those outside of that range intact. It’s useful for cutting problematic frequencies without affecting the rest of the sound spectrum.

Each of these filter types is available with two different slopes: 12dB or 24dB. These slope options give you control over how sharply the filter cuts off frequencies, allowing you to tailor the sound exactly to your preferences.

The cutoff and resonance controls are fully adjustable, offering precise control over the sound. Cutoff determines the point at which the filter begins to take effect, while resonance accentuates frequencies around the cutoff point, creating a peak that can add a musical and expressive quality to your sound. These two primary controls form the foundation of FilterSolo, but the plugin offers even more depth with its modulation features.

Modulation and Envelope Followers

Both the cutoff and resonance parameters can be independently modulated via two Envelope Followers. These envelope followers have adjustable attack and release times, ranging from 10 ms to 1 second, allowing you to create dynamic sounds that respond to the audio in real-time. The ability to control both the attack and release lets you fine-tune how the filter reacts to different inputs, whether you’re working with fast, percussive sounds or slower, evolving pads.

These Envelope Followers provide an intuitive and musical way to shape the dynamics of your sound. You can set them to react quickly for sharp, snappy changes in the filter, or more slowly for evolving, atmospheric effects. This gives you the flexibility to apply the filter’s dynamics to any part of your production, from subtle transitions to dramatic sweeps.

LFO Modulation for Deeper Movement

In addition to the envelope followers, FilterSolo also includes two LFOs (Low-Frequency Oscillators) that can independently modulate either the cutoff frequency or the resonance. The LFOs are highly versatile, with speed settings that can be free-running or synchronized to the host tempo. This synchronization feature is particularly useful for creating rhythmic filter effects that lock perfectly into your track’s timing.

Each LFO can operate in both positive and negative modulation, which means the modulation can either increase or decrease the values of the cutoff or resonance. This dual modulation capability expands your creative possibilities, allowing you to generate both forward and backward movements, or even create complex and evolving sounds with a more pronounced effect.

These LFOs offer a high degree of control over the filter’s modulation, which is essential when working with complex sounds that require nuanced movement. Whether you’re aiming for a subtle, continuous modulation or more dramatic, pulsating effects, the LFOs give you complete creative freedom.

Analog Saturation and Customization

For users who prefer a cleaner sound or wish to eliminate any unwanted noise, FilterSolo allows you to disable both the analog saturation and the hiss effects independently. This option is ideal for those who need a pristine, transparent sound or who are working in situations where noise might be an issue, but still want the flexibility of using the filter’s core features.

This makes FilterSolo an even more versatile tool, capable of adapting to a wide range of audio sources and production styles. You can easily switch between a pure digital filter or an analog-saturated one depending on your needs, making it suitable for everything from modern electronic productions to vintage-sounding mixes.

User Interface and Workflow

The FilterSolo interface is designed for maximum usability and efficiency. Every control is readily accessible, with no complicated modulation matrix or multiple hidden menus. This makes it easier to work quickly, especially when you need to make fast adjustments during a creative session.

The plugin features a large LCD display at its center, which clearly shows all relevant parameters like the cutoff, resonance, and LFO settings. The simplicity of the layout allows you to stay focused on the music, minimizing distractions and enabling smooth workflows, even during intensive sound design sessions.

The user interface is designed to be intuitive, making it easy for both beginners and advanced users to dive in and start shaping their sound immediately. Whether you’re adjusting the envelope followers or tweaking the LFO modulation, you can do so without getting lost in complex menus or unnecessary features.

Conclusion

HoRNet FilterSolo is a powerful, flexible, and creative tool for anyone looking to shape their sound with precision and flair. With its analog emulation, extensive modulation options, and user-friendly interface, it is an invaluable asset in any producer’s toolkit. Whether you’re adding subtle movement to your mix, designing complex filter effects, or experimenting with new sounds, FilterSolo provides the tools you need to take your audio to the next level.

Its combination of high-quality digital processing with analog saturation and extensive modulation capabilities makes it the perfect tool for modern sound design, mixing, and creative exploration. With FilterSolo, you can bring your musical ideas to life in ways that are as precise as they are inspiring.

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Demo

The demo is fully functional except for the fact that every now and then it will silence out, you cannot save parameter values with your session and the plugin will not respond to automation coming from the host.

Features

  • Multi-mode resonant filter with Low Pass, High Pass, Band Pass and Band Stop
  • Frequency range from 20Hz to 20000Hz
  • 12dB/octave or 24dB/octave slope
  • Analog saturation and hiss
  • Two independent envelope generator
  • Two independent LFO with tempo sync
  • Four different waveform for each LFO
  • Envelope and LFO modulation (positive and negative) for cutoff and resonance
  • Mac OS X (>=10.7) and Windows support
  • 64-bit compatibility both on Mac and Windows
  • Audio Units VST2.4, VST3, AAX format
  • Apple Silicon not supported yet

Copy protection

The HoRNet FilterSolo has no copy protection, I don’t believe in copy protection, they are always cracked and they are annoying for the users, we all know you are not going to give away the plugin on the internet…

So simply download the plugin and enjoy your recordings!

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3 thoughts on “HoRNet FilterSolo

macop says:

Excellent.
Saturated resonance is vivid and beautiful.
Frequency envelope turns a boring digital sawtooth wave into a screaming acid bass.

Thomas Gylstorff says:

Simple and easy UI
… but I would love to have longer synced LFO options, i.e. 2, 4 and 8 bars. I like slow-developing stuff 🙂

Brad says:

Atman's description of this plug-in having "unpredictable spikes, sounds drops, and weird screeching noises" basically describes, well, a resonant filter – which is what this is. Resonant filters are plug-ins you oftentimes have got to have patience with to arrive at a final result that works with whatever instrument you are using it with. On the way to your destination (if you get there at all which in some cases you may not) you far more than likely will encounter unpredictable spikes, sound drops, and weird screeching noises. That is just the nature of the beast when it comes to resonant filters.

Anyway, I just tried a demo version of this myself to see what is up with it. Personally experienced no crashes, has a very cool design, and does the job of a resonant filter. There is no resonant filter I know of out there in the same general price range that could touch this. Good deal if you are looking for a cool little nicely designed resonant filter.

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