UNFILTER Free Download

Need to clean up a muddy dialogue recording or match the tone between two different mics? Looking for a surgical tool that can automatically strip away unwanted resonances and filtering from your audio? Zynaptiq's UNFILTER tackles these specific problems, and it's available as a free download for those working in post-production, music, and forensics.

It works by analyzing an audio signal to detect resonances, EQ curves, roll-offs, and even comb filtering effects. You can then use it to remove those characteristics from that same signal or apply the measured filter response to a completely different track to match their frequency response. At its core, it's about linearizing tonal balance automatically.

Adaptive Tonal Contour Linearization

This is the main engine. UNFILTER uses real-time blind de-convolution technology to automatically detect and remove filtering artifacts. You feed it audio, and it identifies what shouldn't be there—like a room resonance coloring a voice or a weird EQ bump from a cheap microphone—and flattens it out. For basic tasks, you often only need a single control.

Measurement & Matching Tools

You're not stuck with just automatic cleanup. You can measure the filter response from one audio source and export it as a standard WAV impulse response file. This lets you save profiles or use them in other software. Conversely, you can import a filter response from an impulse response file and apply it to your signal, which is key for matching different audio sources.

Surgical Equalization & Processing

When you need manual control, UNFILTER includes a full EQ suite. There's a 7-band graphic EQ and a free-form equalization section with different curve interpolation modes for precise shaping. A steep 96dB/octave high-pass filter helps with low-end rumble. For safe batch processing, an output limiter is included to prevent clipping.

Who Should Grab This Plugin

This fits specific, technical scenarios. It's for the dialogue editor trying to seamlessly blend ADR with production audio by matching their spectral fingerprints. It's for the forensic audio specialist needing to clarify and linearize a compromised surveillance recording. It's also useful in mastering or broadcast, where you might need to automatically linearize a frequency response for streaming or apply a consistent tonal correction across an album.

Final Verdict

If your work involves repairing or matching the tonal character of recorded audio—especially dialogue, location sound, or forensic material—UNFILTER provides a unique, automated approach you won't find in a standard EQ. You get a mastering-grade toolset for detection, removal, and application of complex filter shapes. Since it's a real-time plugin, you can use it directly in your DAW session. For these niche but critical tasks, it's a specialized tool worth getting through a plugin torrent if you need to solve these exact problems.