iZotope's award-winning RX is the industry standard for audio repair and enhancement, fixing common audio problems like noises, distortions, and inconsistent recordings. Post production professionals, audio engineers, and video editors alike use RX to transform previously unusable audio into pristine material.

RX's suite of automatic, intelligent modules reduce manual tasks in your audio production workflow, freeing you up to focus on creative experimentation. And for professionals who need to quickly deliver quality results, RX 4 Advanced offers even more specialized post production tools.

Dialogue Denoiser
Restore problematic vocal or production audio recordings in real time

Now available in both RX 4 and RX 4 Advanced, the low-latency Dialogue Denoiser is the most powerful denoiser focused on real-time vocals and dialogue treatment. When unwanted background and ambient noise threaten the quality of vocal recordings, the Dialogue Denoiser replaces the need for costly and time-consuming automated dialogue replacement (ADR)—ensuring professional sounding results, every time. And with an intuitive "set it and forget it" workflow that automatically adjusts to changing noise profiles, those working in high-end post production houses as well as bedroom studios will find it incredibly easy to use.

With an algorithm specifically tuned to keep dialogue as pristine as possible, the Dialogue Denoiser can treat most problems right out of the box—potentially saving you hours of time.

Spectral Repair
Visually isolate and remove unwanted sounds
With RX 4, now you can use RX Connect to unleash all the capabilities of Spectral Repair found in the standalone application with no interruption to your workflow!

Spectral Repair is the key to discovering what your waveform won't show you. Use familiar drawing tools to identify and select problem frequencies and unwanted sounds. Salvage unusable material by filling in audio gaps instantly. With a unique visualization and a variety of selection tools to use, Spectral Repair lets you get closer to your audio—and take a hands-on approach to repairing and enhancing it.

Once a problem sound has been identified and selected, the Spectral Repair algorithms are able to resynthesize the audio while taking into consideration tonal harmonics, nonlinear pitch changes like vibrato, background noise characteristics and transient events. With the power of these tools, you can remove or attenuate unwanted, interfering sounds—from barking dogs and breath noises to string squeaks, fret noise, and missed/wrong notes.

RX 4 Advanced includes a multi-resolution mode that more accurately separates unwanted noise and desired audio.

Leveler [RX 4 Advanced] & Clip Gain
Easily adjust and level the volume of vocals and instrumentals

Non-destructive clip gain is a feature in both RX 4 and RX 4 Advanced. You can draw your ideal volume curve on individual clips with node-based Clip Gain, and use instant visual feedback to balance levels against surrounding vocals or other sounds. In RX 4 Advanced, the intelligent Leveler sets your Clip Gain to a target level automatically—freeing more time for creative mix decisions.

Loudness [RX 4 Advanced]
Ensure compliance with international broadcast standards

The Loudness module quickly makes any mix compliant with the latest network standards across the world, so you can export and deliver your mix to multiple networks. Simply enter the desired True Peak and LKFS values, and click Process. The module will indicate what the loudness measurements are for your audio (integrated, shorterm, momentary, range loudness, and true peak); you can then select a preset or set a desired target Integrated Loudness and True Peak value for the program audio.

Ambience Match [RX 4 Advanced]
Match the environment noise of different audio recordings

Quickly match the environment noise of two different audio recordings. First, learn the source audio clip's ambient noise, then process the learned ambient noise on a target audio clip. A single slider provides control over the amount of learned ambient noise to be applied. The learned ambient noise to be added to a target audio clip will not increase the noise floor of the target file. So if there is already a loud, noisy ambient, the module will not make it noisier. The module also knows not to compound the level of the noise floor if adding the same ambient noise profile to an audio clip. You can also easily create long sections of constant ambient noise to insert under ADR recordings.

EQ Match [RX 4 Advanced]
Matches the sonic differences between audio recordings

In just two easy steps, you can ensure a consistent-sounding mix—even when using multiple audio sources. First, learn the source audio clip's EQ, then process the learned EQ on a target audio clip. A single slider offers control over how the learned EQ is applied. You can easily make smooth transition between multiple audio sources with different EQ qualities.

RX Connect
Streamline your process with a round-trip workflow

RX Connect enables you to use the powerful tools in the RX standalone application in conjunction with your audio or video editing software without slowing down productivity. First, send audio from your host application (DAW/NLE) to RX, where you can repair and enhance. Then, quickly return the new audio back to your host in place of the original audio. RX Monitor enables you to monitor your audio from the RX application through your host application (DAW/NLE). For applications like Pro Tools, which does not allow other applications to use their hardware while launched, this is an essential plug-in.

iZotope Insight® [RX 4 Advanced]
Visualize your mix and comply with loudness standards

Insight is iZotope's essential metering suite, bundled with RX 4 Advanced as an additional plug-in (a $499 value). With its extensive set of audio analysis and metering tools, Insight is perfect for visualizing changes made during mixing and mastering, troubleshooting problematic mixes, and ensuring compliance with international broadcast loudness standards like BS.1770-1/2/3 and EBU R128. Additionally, you can generate a report and image of your Loudness history for use when delivering your mix to the network.

Fully customizable and scalable, Insight allows you to visually monitor all relevant information from your mono, stereo or surround mix in a convenient floating window. Load Insight into your favorite DAW or NLE to keep an eye as well as an ear on your mix at all times.
Learn more about Insight

Dereverb [RX 4 Advanced]
Remove unwanted reverb from a variety of recorded material

Dereverb removes and reduces unwanted reverb from vocal and instrumental tracks, allowing you to keep audio clear and focused. Take control over the amount of ambient space captured in a recording: make large cathedrals sound like small halls and make roomy vocals sound like they were recorded in a proper studio space. With easy-to-use controls and powerful technology under the hood, it's an essential tool for anyone seeking a tighter mix.

Denoise
Reduce unwanted background noise quickly and easily

Denoise provides natural noise reduction with unparalleled clarity and control. Built with the most troublesome audio imperfections in mind, Denoise removes unwanted noise from any type of recording—such as music, old recordings, home movies, production recordings, and more. With transparent noise suppression technology that minimizes artifacts, the Denoise module is carefully designed to preserve the character of your audio. In addition, Denoise allows independent control over both tonal and broadband noise components, providing ultimate creative control over the color of the end result.

RX 4 Advanced features Adaptive Mode, which analyzes changing noise profiles and fixes audio imperfections automatically. It's the ideal choice for fast, efficient audio repair on the fly.

Declick
Eliminate clicks, crackles, pops and digital impulse noises

Declick automatically identifies and removes clicks, pops and digital impulse noises that can ruin a listening experience. Turn to Declick when polishing audio transfers and other recordings suffering from quality degradation, digital errors, mouth noises, and interference from cell phones. For the toughest click and crackle problems, Interpolate Mode allows you to make manual sample-level corrections to audio.

Decrackle is designed to treat continuous background crackle from sources such as vinyl, but can also treat problems like dry-mouthed spoken word and reed noise from woodwind instruments.

Hum Removal
Remove electrical hum and line noise

Hum Removal automatically identifies the base frequency of unwanted hum, and precisely removes it from the recording along with harmonics—ensuring a clean overall sound without electrical interference. For more complex hum and buzz removal, the module also automatically recommends when to use Denoise instead, so you'll always have the best tool at hand for the job.

The "Adaptive" mode removes hum that changes in frequency over time. Unlike traditional filters, this mode removes unwanted hum without side effects, such as the "hollow" sound introduced by comb filters.

Additional Features

MPN: RX 4 ADVANCED

• Turn flawed audio into pristine, usable material by removing noises, distortions, reverb, and more.
  
• Edit your audio like you would edit an image using precision drawing tools, such as a brush and magic wand.
  
• Ensure smooth, even, and consistent vocal and dialogue takes with tools that help match and balance multiple recordings.
  
• Seamlessly integrate with your audio or video editing software, both as a standalone application or plug-in.
  
• Deliver professional-quality results with speed and efficiency, meeting compliance requirements and international broadcast standards.
  
  Audio Post Production
  
• Save time and reduce the need for ADR by cleaning up clipped, damaged and noisy dialogue in real time with RX 4's simple-to-use tools.
  
• Isolate and reduce troublesome background noise in real time with the Dialogue Denoiser.
  
• ADV Easily match the sonic differences between audio recordings from different environments.
  
  Audio Engineering and Recording
  
• Eliminate the amp hum, equipment hiss, and environmental noise that can ruin your recordings.
  
• Fix problems like clipping, audio dropouts, and other sudden unwanted sounds.
  
• ADV Remove unwanted reverb and improve the quality of on-location recordings with the Dereverb tool.
  
  Audio Mastering
  
• Remove noises from live recording with spectral editing.
  
• Attenuate certain sounds within a mix when you can't return to source audio.
  
• Polish your music to professional-sounding quality, whether recorded in a home studio or live environment.
  
  Video Editing
  
• Visualize your audio for intuitive editing with minimal learning curve.
  
• Reduce the background and location noise on production audio.
  
• Clean up voiceover and narration mouth noises.
  
• Reduce the need for ADR by repairing distorted audio affected by sudden screams and other undesirable sounds.
  
  Audio for Broadcast
  
• ADV Ensure loudness compliance with international broadcast standards using the Loudness module and with Insight®, iZotope's enhanced metering suite.
  
• Reduce sudden wind noises, location noise, and electrical buzz/hum on location interviews.
  
  Restoration and Archiving
  
• Restore old mediums such as vinyl, tape and film with precise control over each step of the process.
  
• Streamline your workflow by recording directly into RX 4 and making necessary repairs, then create a high quality export using 64-bit SRC™ resampling and MBIT+™ dithering.
  
• ADV Repair stereo imbalances and phase issues that can occur during tape restoration with Azimuth Alignment controls.
  
  Forensics
  
• Improve the clarity and intelligibility of vocals by removing background noise.
  
• Visually perform edit analyses by using the Spectrogram display.
  
• ADV Keep track of all performed tasks and export a log of your edit history.
  
  Podcasting and Audiobooks
  
• Reduce unwanted noise from location recordings and phone interviews.
  
• Remove distortion and signal clip from recordings using RX 4's enhanced declipping processes.
  
• ADV Automatically level the entire interview without compression using the Leveler.
  
  Operating system requirements:
  
• RX 4 runs as a standalone application, or as a suite of plug-ins for your DAW or NLE.
  
• Windows: 7 and 8
  
• Mac: OS X 10.7 or later (Intel only)
  
• Plug-in formats: AAX (Pro Tools 11), RTAS/AudioSuite (Pro Tools 9-10), VST and VST 3, Audio Unit
  
• Host compatibility: In addition to being available in RX 4's standalone mode, RX 4 modules are also compatible as plug-ins for popular hosts like Pro Tools, Media Composer, Cubase, Nuendo, WaveLab, Logic, Final Cut Pro, Premiere, Audition, SONAR, Vegas, Sound Forge, Ableton Live, and many more.
  
• For information on connecting RX to your favorite host, please refer to this Knowledgebase Article.
  
  What you get with RX:
  The RX standalone application includes a suite of robust features. If you prefer to use RX for a specific task, a number of our modules are also available as plug-ins. You'll get more value from RX, however, when you use it as a standalone version—many of the new enhancements to RX 4 are only available via the standalone application.
  
  With the new roundtrip workflow feature in RX Connect, available in both RX 4 and RX 4 Advanced, working with the standalone version of RX in your video or audio editing software is easy. A single purchase of RX 4 or RX 4 Advanced comes with both standalone and plug-in formats, so RX can be used regardless of your audio or video editing software.