sonible smart:EQ 4 review
A focused EQ plug-in for balancing grouped tracks and shaping spectral space.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
sonible smart:EQ 4 is an AI-assisted equalizer plug-in for music producers, mixing engineers, and audio creators. It analyzes audio for spectral imbalances and supports cross-channel processing to help separate competing tracks. The plug-in runs inside compatible digital audio workstations on Windows and macOS, with VST, VST3, AU, and AAX formats documented by sonible. A 30-day fully functional trial provides time to assess its workflow before purchase.
Pricing is straightforward: the published plan is smart:EQ 4 at $129 USD as a one-time purchase. There is no free plan. The plan includes AI-assisted spectral balancing, cross-channel processing, dynamic EQ, mix profiles, and reference-track matching. Its main strength is depth within EQ-focused work: dynamic bands include threshold, ratio, attack, release, and range controls, while automatic gain compensation supports level-aware adjustments. Mix profiles cover instruments, speech, genres, and full mixes, and reference-track profile matching adds another way to guide tonal decisions.
The workflow is particularly suited to grouped-track balancing. Group view supports up to 10 tracks, with remote control of EQ across grouped instances and cross-channel processing for spectral unmasking. Mid/side processing and multichannel spectral analysis extend the plug-in beyond basic channel EQ. Choose smart:EQ 4 if spectral balance, unmasking, and reference-led EQ are central to your mixing process. An alternative may be a better fit if you need a broader audio production suite or mixing functions beyond its EQ-centered scope.
sonible smart:EQ 4 pros and cons
- Where it wins
- Cross-channel unmasking and grouped control for up to 10 tracks
- Dynamic EQ, mix profiles, and reference-track matching
- Mid/side processing with multichannel spectral analysis
- Where it doesn't
- Focused on EQ and spectral work rather than broad mixing functions
- Grouped control supports up to 10 tracks
- No free plan; the regular price is a $129 one-time purchase
sonible smart:EQ 4 fact sheet, pricing and score →
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