HoRNet ThirtyOne MK2 2.1.0 update

We are excited to announce the release of version 2.1.0 of HoRNet ThirtyOne MK2, our powerful and intuitive 31-band spectrum analyzer with automatic equalization capabilities. This new update brings enhanced compatibility, essential bug fixes, and refined functionality to an already indispensable tool for mixing and mastering professionals.

At its core, ThirtyOne MK2 combines two essential components found in professional audio setups: a spectrum analyzer and a graphic equalizer, both built around the standard 31 one-third octave bands. These tools have long been staples in live sound mixing environments and are often placed on the master bus to ensure tonal balance and accurate frequency monitoring.

The plugin is inspired by a revered piece of Italian analog hardware, known for its precision and musical response. We’ve meticulously modeled its behavior, paying special attention to its unique time response characteristics. From visual feedback to filter shaping, our digital recreation is designed to deliver the feel and function of a classic analog unit while leveraging the flexibility of modern digital workflows.

The graphic equalizer section is modeled after classic analog EQ units, bringing a familiar and tactile feel to your signal chain. Our attention to detail goes deep—even replicating the smooth LED behavior of the original hardware by simulating the gradual current flow that drives the LED displays. Each LED column in the analyzer reflects a 20dB/octave filter, just like in the physical unit, offering a natural and intuitive way to monitor your audio spectrum.

To further adapt to your workflow, the LED meter response time is fully adjustable. You can select from three different response speeds—0.25, 1, or 4 seconds—allowing you to track fast transients, average energy levels, or slower frequency trends. This flexibility makes it equally useful for detailed spectral analysis and broad tonal shaping.

Each LED can represent 1, 2, or 3 dB steps, with an additional option for 6dB per LED for a broader overview. The dB scale on the left side of the display updates automatically when you change resolution settings, so you’re always aligned visually with your chosen precision. One useful feature we’ve added that wasn’t available in the original hardware is the peak-hold option. This lets you monitor peak levels for each frequency band, and you can enable or disable it depending on your needs.

Beneath the spectrum analyzer lies the heart of the equalization section—31 sliders corresponding to the 31 frequency bands. Each slider lets you shape your audio with precision, controlling a standard one-third octave filter with gain ranging from -15 to +15 dB. Whether you’re correcting frequency build-ups, carving space in a mix, or fine-tuning tonal balance, these sliders offer tactile, detailed control. If you prefer even more accuracy, you can type specific dB values directly into the field below each slider.

A standout feature of ThirtyOne MK2 is the Auto EQ function—a tool designed to save time while enhancing spectral balance. When activated, Auto EQ dynamically adjusts each frequency band based on the current spectral reading from the analyzer. This process helps smooth out frequency imbalances and can be used as a creative starting point or as a final polish. You can choose between three different Auto EQ algorithms:

• Average – a mathematically balanced model based on mean values

• Median – a robust approach that reduces outliers

• Lucky – an unexpected algorithm discovered during development, which delivers pleasing, musical results

Each algorithm has its own tonal flavor, and users can experiment to find the one that best suits their material and goals.

With version 2.1.0, we’ve introduced a series of key updates aimed at making ThirtyOne MK2 more stable, compatible, and reliable in a variety of environments:

• Added support for Apple M1 processors, ensuring smooth performance on modern Mac systems with Apple Silicon

• Corrected the manufacturer name in the AAX format, improving plugin management in Pro Tools

• Fixed an issue with slider values increasing unexpectedly when sessions were saved with EQ boosts over 50%

• Resolved a display issue in certain DAWs, where LED bars incorrectly showed full-level readings even when no audio was present

These improvements make ThirtyOne MK2 even more dependable, whether you’re working in a home studio, a live mixing situation, or a professional mastering room.

As always, this update is completely free for all existing users of the plugin. To download the latest version, simply log into your account on our official website and access the updated installer from the user area. Installation is quick and straightforward, and once complete, you’ll be ready to enjoy all the new features and fixes.

At HoRNet, we’re committed to creating tools that not only sound great but also integrate seamlessly into your workflow. With the release of ThirtyOne MK2 version 2.1.0, we continue to build on that promise—delivering vintage-inspired tone with modern innovation.

Stay tuned for more updates and enhancements, and as always, thank you for being part of the HoRNet community.