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Description
The Equalizer 1 by ZL
The ZL Equalizer is a free, open-source parametric/dynamic EQ plugin for music production, offering flexible, high-quality equalization with up to 16 bands and advanced features like dynamic band control and multiple stereo modes.
It’s available on Windows, macOS, and Linux in AU and VST3 formats.
Specs:
• Type: Parametric / dynamic equalizer audio plugin (VST3, AU)
• Price: Free, open-source (GPL v3)
• Platforms: Windows, macOS, Linux
• Bands: Up to 16 frequency bands
• Filter types: 8 selectable filter types (e.g., bell, shelf, pass)
• Stereo modes: 5 stereo processing modes (e.g., L/R, Mid/Side)
• Slopes: 7 variable slopes for fine control
• Processing quality: 64-bit floating-point DSP for high-resolution audio
• EQ modes: Includes minimum-phase and (optional) linear-phase processing for transparent results
• Dynamic EQ: Per-band threshold, attack, release, and side-chain frequency controls
• Visualization: Interactive spectrum graph and real-time response curve
• Automation: Fully automatable parameters for integration in DAWs
• User interface: Modern UI with intuitive band editing and smart collision detection
• Use cases: Mixing, corrective EQ, surgical frequency shaping, dynamic EQ tasks
Owner's manual
ZL Audio Equalizer User ManualProduct specs
| Plugin Format | VST, AU |
| Operating Systems | Mac, Windows |
| Downloadable | free |
Videos
Creative Sauce
Is this the best FREE EQ alternative?
Is this the best FREE EQ alternative?
Creative Sauce
ZL Equalizer: Free and Open-source Equalizer Plugin
Luyu Liu
FREE Plugins That Compete With The Best! | ZL Audio
Sam Loose Audio Engineer
Possibly the best free dynamic EQ - the ZL EQ
Audio Mountain
ZL Equalizer by ZL Audio, FREE for all platforms
Sound-tutor
EQ Matching with ZL Equalizer
Sound-tutor
Reviews
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about ZL Audio Equalizer.
Features and functionality
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The dynamic EQ in the ZL Equalizer is praised for its natural and transparent output, with sidechain and mid/side band capabilities being particularly useful.
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The ZL Audio Equalizer includes more dynamics controls than Pro-Q3, offering threshold, attack, release, and knee settings, although lacking automatic, program-dependent thresholds.
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Unlike Pro-Q3, the ZL Audio Equalizer does not include natural or linear phase modes, which may affect specific sound processing preferences.
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Software and compatibility
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The "BREAKING CHANGES" label indicates updates that modify the DSP algorithm, potentially altering outputs from previous versions, suggesting users back up projects before upgrading.
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The plugin experiences crashes if the C++ runtime isn't updated, highlighting a potential setup issue when integrating into digital audio workstations (DAWs).
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Being open source, users can back up the plugin’s source code and binaries, ensuring future compatibility through potential recompilation if necessary.
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Comparisons
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Considered a great free alternative to Pro-Q4, though lacking the spectral processing feature that enables more transparent track unmasking.
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Use cases and applications
Critic Reviews
5.0 out of 5
Based on 1 Review and 1 Rating
1168
My fav. Can't believe it's free. LINUX!!!
I have both the 1st and 2nd versions of this. I prefer the 1st because the eq shapes are labeled. In the 2nd version they use symbols instead. I love this for acoustic guitar because in only 1 instance, you can add 4 eq moves and 2 or 3 dynamic eq moves as well. Awesome! So easy to use and understand. Also you can see the waveform in realtime which is very helpful. Can't mix without it! Works on Linux and Reaper!
Genre Usage
Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.
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