Ever Spent Hours Wrestling With Stereo Width, Only To Lose Your Bass In Mono?
You know that frustrating feeling: you’ve got a fantastic vocal track, but it’s a stereo disaster. It whispers in the verses and screams in the chorus. You start twisting auto EQ, side gain, correlation, learning knobs… 20 minutes later you’re still trying to figure out why it sounds either pumped or, worse, completely lifeless.
The uncomfortable truth? Traditional wideners force you to guess. Every audio source has its unique correlation characteristics, and you’re trying to set parameters “in the dark” hoping they’ll work. Meanwhile, the material you’re widening keeps changing, and you’re there micro-managing every single setting like you’re defusing a bomb.
That’s exactly why we created ZeroWidth. After 15 years of plugin development and thousands of hours studying how engineers actually work, we understood something fundamental: the fastest way to achieve musical widening is to let the widener adapt to your audio, not the other way around.
The result? An intelligent widener that analyzes in real-time your material, auto-calibrates all parameters, and offers you seven multi-band bands to instantly change character.
Now you can achieve professional, musical widening without the circus of infinite parameters. Whether you’re recording vocals, taming nervous acoustic guitars, or adding controlled width to the mix bus, ZeroWidth adapts to your needs with zero setup time and maximum musicality.
Intelligent Stereo, Maximum Intelligence
No more endless tweaking of auto EQs, side gains, and timing parameters that seem to change meaning every time you change audio source. ZeroWidth features real-time correlation profile analysis that automatically calibrates all widening parameters based on your audio’s unique characteristics. Just insert it on your track, hit play, and watch it lear
Multi-Band Correlation Analysis
ZeroWidth analyzes your audio’s correlation profile and automatically sets auto Side EQ, auto Width, per-band correlation learning, 7 manual band overrides. No guesswork, no endless tweaking.
- Real-time correlation profile analysis
- Adaptive auto EQ and side gain
- Intelligent correlation and learning
Auto Side EQ with Band Targets
Visual feedback shows the learning progress. You’ll know exactly when ZeroWidth has analyzed enough material and is ready to deliver optimal widening.
- Learning progress visualization
- Ready-to-go indicators
Zero-Latency Per-Sample Processing
The processing engine is designed to avoid parameter oscillations and phase cancellation, ensuring consistent, musical results across all material types.
- Stable correlation
- Musical response curves
Perfect for Any Bus
Whether you’re tracking, mixing, or mastering, ZeroWidth adapts to your workflow. Use it in mixing for enhanced buses, or in mastering for transparent widening.
- Mixing: Bus and group widen
- Mastering: Transparent control
It’s like having an expert engineer’s ears, automated. ZeroWidth listens to your material and configures the widener for you.
Seven Frequency Bands, Auto-Widening
10kHz
Sweet, musical response for melodic vocals and transparent master bus control. When you want widening to be felt but not noticed, 10kHz is your choice. Perfect for R&B, pop, ballads, and anywhere you need naturalness.
1.25kHz
Fast, precise response for drums and acoustic guitars with emphasis on transients. 1.25kHz is your ally when you want correlation to remain sharp and defined. Great on buses with light widening (~3 dB side gain), different character than 156Hz.
156Hz
Full, decisive tone for bass, aggressive vocals, and widthy drums. 156Hz adds body, density, and presence. Perfect for rock, punk, rap, and any material that needs “thickness” and impact.
Simple Controls, Professional Results
Want effortless widening? Just adjust the Widening percentage from 0-100%. At 100%, ZeroWidth widens the full correlation profile detected by its analysis engine. Use the Auto EQ control to scale the per-band Auto Side EQ amount, or override the 7 manual band gains to add character and density to specific frequency bands.
Widening
Single percentage control for widening amount. At 0%, no widening is applied. At 100%, the full widening range (equal to detected correlation profile) is widened. Intermediate values modulate correlation proportionally.
Auto EQ
Scales the per-band Auto Side EQ amount from 0% (disabled) to 200% (intensified). Use conservatively for transparent widening, or push higher for creative stereo effects. Tweak until you find the right balance for your material.
Reset
Re-trigger the learning algorithm. Use when changing audio material or wanting to recalibrate to a new correlation profile. Convergence indicators will show when models are ready again.
Bypass
Instant A/B comparison. Toggle processing on/off to evaluate the effect of widening on your material.
It’s like having an expert engineer’s ears, automated. Zero manual philosophy, just musical results.
Why ZeroWidth Is Different
| Traditional Stereo Imager | HoRNet ZeroWidth |
|---|---|
| You must set auto EQ manually | Auto-calibside gainn based on correlation profile |
| Fixed or guessed correlation and learning | Adaptive parameters to audio material |
| Setup requires time and testing | Zero setup: insert and go |
| Risk of phase cancellation | Auto width and EQ prevents cancellation |
ZeroWidth doesn’t replace your ears: it enhances them. It gives you the creative control you want but eliminates the repetitive technical work that slows you down.
Built for Modern Workflows
Clean, Hardware-Accelerated Interface
Minimalist design with scalable, GPU-accelerated graphics. Works smoothly on both standard and retina displays.
Real-Time Meters
Input, output, and correlation meters provide instant visual feedback on widening behavior.
Apple Silicon Native
Optimized for M1/M2/M3/M4 chips with native ARM support for maximum efficiency and minimal CPU usage.
Cross-Platform Compatibility
Available in Audio Units (AU), VST3 and AAX formats for macOS (10.15+) and Windows (10+).
Perfect for producers who want professional results without technical complexity, mix engineers seeking musical widening, and mastering engineers requiring transparent control.
Technical Specifications
Platforms
macOS 10.15+
Windows 10+
Formats
Audio Units (AU)
VST3
AAX
Apple Silicon
Native ARM support
M1/M2/M3/M4 optimized
Interface
Hardware-accelerated
Scalable graphics
Processing
Real-time correlation profile analysis
Adaptive widening engine
Latency
Minimal
Suitable for live tracking
Frequently Asked Questions
Does ZeroWidth replace all my wideners?
Not necessarily. ZeroWidth is designed to give you fast, intelligent, musical widening. If you have vintage wideners you love for their specific color, ZeroWidth doesn’t replace them, but it can become your “go-to” for 90% of daily widening work.
What happens if I change audio material?
Press Reset to force ZeroWidth to re-analyze and recalibrate. The convergence indicators will show you when the models are ready again. This ensures optimal widening parameters for the new material.
Can I automate parameters?
Yes, you can automate Auto Width, Auto EQ, and every EQ band for evolving creative widening. All parameters are DAW-automatable, allowing you to create evolving widening effects throughout your track.
How long does the learning phase take?
ZeroWidth typically needs a few seconds of audio material to analyze and converge. The convergence indicators for each model will turn green when they’re ready. More varied material may require slightly longer analysis time.
Is ZeroWidth CPU-intensive?
No. Despite its intelligent analysis engine and seven multi-band bands, ZeroWidth is optimized for efficiency. It’s suitable for multiple instances across tracks, buses, and master. Apple Silicon native support ensures minimal CPU usage on M-series chips.
Try ZeroWidth Free
No functional limitations, no credit card required. Insert it in your project and discover how fast and musical intelligent widening can be.
No copy protection
We have decided 15 years ago to not employ any complicated copy protection. We just add a watermark with your email address in it to the files you download. Trust is the best copy protection.
💡 Want to save?
ZeroWidth is also available in the ZeroBundle — get 5 Zero plugins together at a discounted price.