About
smart:EQ 4 by Sonible is a next-generation AI-powered equalizer plugin designed for music producers, mix engineers, and audio professionals. At its core is the proprietary smart:filter technology, which analyzes audio content and automatically balances the signal based on a target Profile selected for your instrument, vocal, or mix channel — eliminating guesswork and dramatically speeding up the mixing process. What sets smart:EQ 4 apart is its innovative cross-channel processing capability. Unlike traditional equalizers that treat each track in isolation, smart:EQ 4 allows you to group up to 10 tracks and define a hierarchical unmasking structure through simple drag-and-drop, letting you place elements in the foreground, midground, or background of the sonic stage. The plugin automatically handles the spectral relationships between grouped tracks. The smart:filter operates in three modes: 'Track' for individual channel balancing, 'Group' for inter-track unmasking without affecting the channel itself, and 'Track and Group' for combined processing. Users can fine-tune the AI with Smoothing and Adaptive parameters, and load custom reference tracks to emulate a desired spectral character. Additional features include dynamic EQing, auto gain, genre-based mix profiles, and remote instance control — allowing any grouped instance to be managed from any other. A fully functional 30-day free trial is available, with purchase required for continued use.
Key Features
- AI-Powered smart:filter: Automatically analyzes and balances the spectral content of any audio track using instrument, vocal, or genre-specific target profiles.
- Cross-Channel Spectral Unmasking: Group up to 10 tracks and define a hierarchical sonic stage via drag-and-drop, enabling intelligent inter-track frequency management across the entire mix.
- Reference Track Profiling: Load a reference track to generate a custom EQ profile and have smart:EQ 4 emulate its spectral character on your channel or bus.
- Dynamic EQ & Adaptive Processing: Dynamic EQing and an Adaptive parameter smooth out highly dynamic signals for consistent, natural-sounding tonal correction over time.
- Remote Instance Control: Any plugin instance within a group can be controlled from any other instance, eliminating constant window-switching during multi-track sessions.
Use Cases
- Automatically correcting tonal imbalances on individual instrument and vocal tracks during mixing sessions
- Managing spectral unmasking across a full drum kit, string ensemble, or multi-instrument group via a drag-and-drop priority hierarchy
- Matching the spectral balance of a track or mix bus to a commercial reference song for A&R or mastering workflows
- Applying dynamic EQ to smooth out frequency inconsistencies in highly dynamic performances such as lead vocals or acoustic guitar
- Performing final spectral polish on a stereo mix bus using genre-based AI profiles to achieve a competitive, broadcast-ready sound
Pros
- Massive Time Savings: AI-driven EQ decisions significantly reduce the time spent correcting tonal issues, making it ideal for fast-paced commercial sessions.
- Unique Cross-Track Awareness: The hierarchical drag-and-drop unmasking system is a genuinely innovative approach that very few other EQ plugins on the market offer.
- Highly Customizable AI: The smart:filter can be fine-tuned with smoothing, adaptive modes, and custom reference track profiles for tailored, creative results.
- 30-Day Fully Functional Trial: Users can test the complete feature set without limitations before committing to a purchase, lowering the barrier to entry.
Cons
- Premium Price Point: As a paid plugin, it represents a significant investment for hobbyist producers who may already have capable EQ tools bundled with their DAW.
- AI May Conflict with Creative Intent: Automated spectral corrections can occasionally work against intentional sonic choices, requiring manual adjustments to override the AI's decisions.
- Desktop DAW Dependency: Requires a host DAW on macOS or Windows; it is not available as a standalone or web-based application.
Frequently Asked Questions
What is smart:EQ 4?
smart:EQ 4 is an AI-powered equalizer plugin by Sonible that automatically corrects tonal imbalances on audio tracks and enables intelligent cross-channel spectral mixing for up to 10 grouped tracks simultaneously.
How does the AI equalizer work?
The core smart:filter technology analyzes your audio signal and applies EQ corrections based on user-selected target Profiles for instruments, vocals, or mix genres. It can also adapt to a loaded reference track to emulate a specific spectral character.
Can I try smart:EQ 4 before buying?
Yes. Sonible offers a fully functional 30-day free demo. You need to register on the Sonible website to receive your trial license.
What is cross-channel spectral unmasking?
It is a feature that lets you group multiple tracks and assign each a priority position in the mix (foreground, midground, background) via drag-and-drop. smart:EQ 4 then automatically adjusts each track's EQ to reduce frequency clashes between all members of the group.
Which DAWs and plugin formats does smart:EQ 4 support?
smart:EQ 4 is available as VST, VST3, AU, and AAX, making it compatible with most professional DAWs on macOS and Windows, including Ableton Live, Logic Pro, Pro Tools, Cubase, and Reaper.
