UNFILTER, our original and award-winning smart equalizer plug-in, solves any corrective EQ task auto-magically (or manually, if preferred), with stunning precision, an incredibly quick workflow, and pristine quality.
Fix extreme EQ issues such as bandpass-, comb-, or lowpass-filtering, adaptively catch rogue frequencies, smoothe out harsh treble, gently re-balance the spectrum dynamically, or just use it as an unbelievably clean, tight and smooth sounding free-form EQ – UNFILTER is the ultimate EQ solution and a must-have in your toolbox! Whether you're in music production, film post, game audio, broadcast, sound design, forensics, or engineering – UNFILTER makes time-consuming and often impossible tasks as effortless as adjusting one control.
APPLICATIONS FOR UNFILTER
UNFILTER is an incredibly versatile frequency response tool with a broad range of applications. We've compiled some of them here, organized by field of work.
SOUND FOR PICTURE
UNFILTER is a real workhorse in audio post. Its automatic recognition of frequency response anomalies is extremely useful for cleaning up production sound, and especially for enhancing the intelligibility of dialog. Here are some example scenarios:
Remove comb-filtering caused by multiple "open" mics being mixed to one iso track, or by proximity to reflective surfaces.
Remove resonances caused by room geometry or using shotgun mics near off-axis reflective surfaces.
Remove recording path roll-offs and lav mic chest resonance.
Increase level separation between dialog and background sounds.
Make ADR blend better with production dialog.
Synthesize room tone to fill editing gaps or to layer with ADR by applying a measured filter response to noise.
Make crowd atmos, walla or dense ambience collide less with dialog.
Manipulate apparent distance of background sounds by emphasizing room filtering effects.
“Worldize” SFX and foley recordings.
Speed up any equalization and low-cut filtering task.
Improve mix translation to non-standardized playback environments, like TVs or PCs, by removing resonances that would add up with the frequency response of the playback system.
Save hours of expensive mixing stage time.
MUSIC PRODUCTION & MASTERING
In music production and mastering, fine-tuning the frequency response of your signals is one of the most commonly encountered tasks. Recordings of acoustic instruments and live performances often exhibit unwanted peaks and notches, and as the instruments in a song are typically playing in the same key, there is excessive build-up in the frequency ranges where the relevant pitches have their fundamentals and harmonics. Also, your clients may have delivered processed tracks, limiting what can be done to “fix it in the mix”. UNFILTER’s automatic recognition of frequency response anomalies and its high-precision filtering engine make it a very flexible solution for all of these issues. Below are some examples of what UNFILTER can do for you:
Remove resonances and other frequency response issues from recordings of acoustic instruments or live performances.
Remove EQ or filtering “printed” to tracks delivered for mix-down or mastering.
Remove guitar cabinet coloration, or apply it to a DI guitar.
Apply corrective EQ to any source within seconds.
Exaggerate a sound’s coloration to more firmly place it in it’s own frequency “window”.
Remove low-mid buildup from sub-mixes and mixes without losing the “body” of the sound.
Balance the spectrum of one or multiple songs.
Capture the frequency response of outboard EQ or other signal paths & apply it or store it as impulse response (WAV).
Accentuate the natural low end on acoustic bassdrums.
Remove spectral peaks caused by corpus resonance, for example on bass or acoustic guitars.
Apply a track’s measured filter response to overdubs made with a different recording setup to make them blend better.
SOUND DESIGN
UNFILTER’s ability to completely reshape the spectral contour of a signal, extract the filter response from a sound and apply it to a different file, and to solo the noisy components contained in a sound makes it an excellent tool for designing new sounds. Here are just a few ideas on how UNFILTER can aid you in creating that unique new sonic entity:
Extract a filter response curve from a sound and apply it to another.
Remove the natural corpus resonance from a sound and apply a different one.
Open or close synth lowpass filters after the fact.
Bring out aspects of a sound normally hidden behind other features.
Synthesize drones, hiss or rumble by extracting a filter response from an example sound & applying it to noise or other broad-band quasi- /cyclo-stationary sounds.
Use NOISE MONITOR to isolate the noisy components of a sound.
Generate multiple object state sounds from one file for game-audio.
Animate the frequency response of static sounds to make them more "alive".
Improve translation to consumer playback systems like gamer PCs.
Generally fine-tune the frequency response of a sound with unprecedented precision.
BROADCAST & ENG
When broadcasting audio, it is important to maintain a consistent and balanced audio spectrum, to ensure optimal performance of all down-stream systems, including dynamics processing, codecs and playback devices...and, most importantly, to provide a high-quality, consistent and non-fatigueing listening experience to the audience. As the acoustic properties of the footage used can vary strongly to say the least, this is no trivial task. Electronic News Gathering (ENG) in the field can often require using only small, portable and inconspicuous devices, and/or low bandwidth transmission systems, due to infrastructural, political or safety-related issues. In many cases, it’s either low-fidelity footage, or none at all. UNFILTER’s adaptive processing will help you make even the most difficult footage usable, and deliver the best possible audio every and any time. Here are some things UNFILTER will do for you:
Apply adaptive equalization to time-varying audio content, such as mixed music audio streams.
Enhance intelligibility of speech recordings by removing resonances and signal path related roll-offs.
Improve translation to consumer playback devices by removing non-linearities that would add up with those of the playback system.
Reduce the coloration imparted by transmission through telephones, megaphones, intercoms, P.A. systems etc.
Increase intelligibilty of speech recorded using low-fidelity or covertly worn recording devices.
Increase the separation of speech from background sounds.
FORENSICS
UNFILTER can assist in extracting information from recordings in multiple ways. Intelligibility of speech recordings can be greatly enhanced, the filtering effects of microphone occlusion can be removed, and you can even make sounds buried beneath others more audible. Some usage scenarios are:
Increase intelligibility of speech recorded using low-quality, occluded or damaged audio equipment.
Make sounds buried beneath other sounds more audible.
Increase separation between speech and background sounds.
Reduce the filtering effects caused by telephone transmissions.
Remove resonances and filtering effects caused by an intermediate medium, such as walls or windows.
IN-DEPTKEY FEATURES & SPECIFICATIONS
Automatically detect and remove resonances, equalization, roll-offs and the effects of comb filtering from musical, location dialog, 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.
Output limiter for unsupervised use in batch processing applications.
Highly time-efficient workflow and UI
Mac OS X
Apple AudioUnits (32/64bit)
Avid RTAS
Avid AAX Native including AudioSuite (32/64bit)
Steinberg VST 2.4 (32/64bit)
Apple Mac computer
OSX 10.6.x or newer
Intel CPU with at least 2 Cores
Apple AU (AudioUnits), Steinberg VST 2.4 or Avid RTAS/AAX compatible Host software
Windows
Avid RTAS
Avid AAX Native including AudioSuite (32/64bit)
Steinberg VST 2.4 (32/64bit)
Windows XP SP3, Windows Vista or Windows 7
CPU with at least 2 Cores
Steinberg VST 2.4 or Avid RTAS/AAX compatible Host software
For AAX Native 32-bit, the minimum required Pro Tools version is 10.3.5
Please Note
UNFILTER uses a lot of CPU. Please download the free trial version to see whether your DAW has sufficient resources to use UNFILTER effectively.
UNFILTER CPU Load Optimization
UNFILTER uses some very complex mathematics, and thus uses a considerable amount of CPU processing time. Here are a couple of suggestions how you can get the most out of your CPU:
Try increasing buffer sizes in your host software to their largest values, then gradually bring them back down until you find a suitable balance between latency and CPU load. In Logic Pro, this also includes the "Process Buffer range" parameter. We recommend using an I/O buffer size of at least 1024 samples.
Try closing the GUI of any plug-in that you don't currently need to have visual feedback on, including UNFILTER after adjusting settings.
Quit any open applications that are not needed.
In Logic Pro, all processes that are fed by a live source are processed on one CPU core. Bounce/record any live inputs feeding into UNFILTER to allow Logic to assign cores as needed. "Live" inputs include Instrument tracks that are record enabled.
In Pro Tools, using a multi-mono instance is preferable to using a stereo instance in terms of CPU consumption, as this allows Pro Tools to render the channels on separate cores.
In Pro Tools 10, render to a new file by pasting the setting used in a real-time instance into the AudioSuite version of UNFILTER for processing. The RTAS plug-in does not support AudioSuite.
In general, when using multi-channel versions of the plug-in, please bypass any channels that you don't really need to process (like the LFE channel, for example).
