Calibra

Calibra

Open headphone calibration for your DAW.

Calibra is a VST3 plugin for Windows and macOS that lets you load your own correction files and monitor through a controlled headphone calibration chain directly inside your DAW.

Not a closed headphone-profile system.
Your correction file defines the response.

Load TXT correction files, work with measured or AutoEQ-style data, import and export FFP presets, choose between IIR and FIR correction modes, compare setups with A/B slots, and use practical monitoring tools such as crossfeed, width, pan, Mid/Side and Left/Right checks.

Try the demo first. The demo includes the full calibration engine and monitoring tools, with periodic short silence and saving/exporting disabled.

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Main features

• Open correction-file workflow — use your own correction files instead of fixed headphone profiles.
• TXT support — including AutoEQ / Equalizer APO-style Preamp, Filter, GraphicEQ and Include.
• FFP preset import and export — move correction data between compatible preset workflows.
• IIR and FIR correction modes — choose different phase, latency and ringing compromises.
• A/B calibration slots — compare correction files, targets, headphones or correction strengths.
• Crossfeed and monitoring tools — reduce extreme headphone separation and check stereo, mono, Mid/Side, Left and Right behavior.
• Project recall — keep the applied correction snapshot saved inside your DAW project.

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Technical Validation Measurements:

Correction-file support

Calibra is designed for users who work with custom headphone correction files, measurements, AutoEQ-style data, personal target curves or manually edited calibration files.

Supported TXT elements include:

• Preamp
• Filter
• GraphicEQ
• Include
• enabled / disabled filters
• parametric EQ filters
• graphic EQ correction curves
• relative include paths
• decimal comma parsing

Supported Equalizer APO-style TXT files are tested with a null-test oriented workflow, with the goal of reproducing compatible correction files inside the DAW in a measurable and repeatable way.

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Phase modes

Mode	Best for	Behavior
IIR Minimum Phase	Everyday monitoring	Low-latency minimum-phase correction.
FIR Minimum Phase	Immediate FIR-based correction	FIR correction behavior with zero reported latency.
FIR Natural Phase	Balanced headphone correction	A compromise between phase behavior, ringing and latency.
FIR Linear Phase	Critical checks	Linear-phase FIR correction with host-compensated latency.

These modes are useful because headphone calibration can involve different tradeoffs between latency, phase response, ringing behavior and correction accuracy.

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A/B calibration and monitoring

Calibra includes two calibration slots: A and B. Each slot can store its own correction file, correction snapshot and monitoring settings.

Use A/B slots to compare two headphones, two correction files, measured vs AutoEQ-style correction, different target curves, different phase modes or subtle vs stronger correction.

Monitoring tools include:

• input gain;
• pan;
• stereo width;
• bass side cut with adjustable crossover frequency;
• stereo, Left, Right, Mid and Side monitoring;
• crossfeed presets and custom crossfeed controls;
• safety protection for excessive output levels.

Do not export your final mix through Calibra unless you intentionally want to print the headphone calibration into the audio.

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Demo and license

A free demo is available.

The demo includes the full calibration engine, correction-file loading, IIR/FIR modes, A/B slots, crossfeed and monitoring tools.

Demo limitations:

• periodic short silence during playback;
• saving/exporting is disabled.

The full version removes these limitations and unlocks normal project use.

Calibra requires online activation on first launch using your itch.io download key. An internet connection is needed for the initial activation.

Offline activation via a signed license key is available on request for systems that cannot connect to the internet.

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System requirements

Windows

• Windows 10 or later
• 64-bit system
• VST3-compatible DAW or host

macOS

• macOS 10.15 Catalina or later
• Intel and Apple Silicon supported
• VST3-compatible DAW or host

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Changelog

0.9.0 — 2026-06-26

Early access release.

• First public release.
• Open TXT correction-file workflow.
• FFP preset import and export.
• IIR and FIR correction modes.
• A/B calibration slots.
• Crossfeed and monitoring tools.
• Demo mode and license activation.

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Disclaimer

Third-party headphone names and trademarks

Calibra is an independent plugin and is not affiliated with, endorsed by, sponsored by or officially supported by any headphone manufacturer.

Any headphone brand names, model names or trademarks mentioned in presets, correction files, documentation or examples are used only for identification and compatibility/reference purposes.

Correction files and presets are user-loadable and may be based on third-party measurements, personal measurements or manually edited target curves. They should not be considered official manufacturer profiles unless explicitly stated by the original rights holder.

All trademarks and product names remain the property of their respective owners.