UNFILTER

UNFILTER is a real-time plug-in that removes filtering effects such as comb filtering resonance or excessive equalization – effectively linearising a signal’s frequency response automatically.

UNFILTER can also apply a captured filter response to another signal or export it to disk as an impulse response, and can even perform mastering-grade adaptive free-form and graphic equalization. Whether you work in music production, film post, game audio, broadcast, sound design, forensics or engineering – UNFILTER makes time-consuming and often impossible tasks as easy as adjusting a single control.

UNFILTER features at a glance:

• Automatically detect and remove resonances, equalization roll-offs and the effects of comb filtering from music, location, dialogue and surveillance recordings.
• Apply the measured filter response to other signals to place them in the same “acoustic world”.
• Export the measured filter response to, or import it from, a linear- or minimum-phase impulse response file (WAV).
• Mastering-grade adaptive free-form and graphic equalization.
• Extremely steep 96dB/octave shelving high-pass filter.
• Output limiter for unattended use in batch-processing applications.
• Highly time-efficient workflow and UI.

For an overview of use cases for UNFILTER in audio-to-picture, music production/mastering, sound design, broadcast or forensics, please take a look at the UNFILTER application page.

Set It Straight

UNFILTER automatically detects resonances, EQ or filter effects – essentially any frequency-response anomaly that is not part of the original signal. You can then remove these simply by adjusting a single control, leaving the rest of the signal largely untouched. As a result, previously problematic or unusable recordings can be made to sound good, and good recordings to sound amazing. In real time and with minimal effort, Zynaptiq style.

Make It So

You can also apply the measured filter response from one recording to another – placing the two in the same acoustic “world”. Or you can create room tone to fill editing gaps by applying a measured filter response to noise. Of course, you can also save the filter response to disk as linear- or minimum-phase impulse response files and build a library of “colours” that you can have available at any time. Whether you need to get ADR to blend with production dialogue, make a guitar snippet sound like part of another, or create new sounds, UNFILTER makes the job fast and easy.

More Equal

UNFILTER is also an EQ. Three mastering-grade EQs and an excellent high-pass filter, actually. First, its (un-)filtering engine can work as an adaptive program equalizer that continuously adjusts itself while audio plays. This helps maintain a balanced spectrum when working with audio that changes over time, for example when streaming mixed music in broadcast applications. Second, UNFILTER has a free-form EQ with various curve interpolation methods, from super-smooth slopes to narrow notches to brickwall steps. Third, we added a streamlined 7-band graphic EQ for good measure. And finally, there’s a super-steep 96dB per octave shelving high-pass filter that removes low-frequency rumble so effectively you’ll forget there was ever anything down there.

Rocket Science

How does UNFILTER do all that? Technically, it performs real-time blind deconvolution, a groundbreaking technology that is rarely found even in the most advanced research institutes. Fortunately, we don’t wear lab coats.

This technology enables UNFILTER to take a closer look at your audio, estimate what happened to its frequency response, and then create a filter that will undo the process. Sounds like rocket science? That’s because it is. But all the technology in the world doesn’t mean anything if it’s hard to operate or doesn’t sound good. Well, UNFILTER is a breeze to use and doesn’t just sound good... it sounds amazing.

Lightspeed

The UNFILTER UI is so fast and easy to use that corrective EQ can often be done within seconds simply by adjusting one of our super-smooth trackball sliders. And for advanced customisation, every single feature and control has been engineered with careful attention to detail – fine-tuned for optimal workflow and results. No matter which control you move, the right setting is never far away. UNFILTER is not only a lifesaver, it’s also a time-saver par excellence. But don’t take our word for it – experience it yourself with the free trial!