Last Updated on October 15, 2020
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If you deal with sound recordings on a daily basis, you are probably keen on the numerous issues that can come along with making them sound good. Whether the sound was recorded by a professional recordist or a complete novice, sometimes there are anomalies and noise problems that you simply can’t get away from, even if you follow all the rules to getting great sound on set.
Sound Cleaner II is an audio restoration program that provides the necessary tools for a full range of noise suppression and speech enhancement tasks. The Online Video Filter Tool allows you to put filters on videos on your PC, Mac, iPhone or Android. It works with all the popular formats like MP4, MOV, AVI, etc.
Noise reduction software is your saving grace. There are a few really solid tools out there, some you’ve certainly heard of, and others you may not have. Let’s break down some of your best options.
Accusonus ERA (N/R/D) – Noise Reduction Magic
Accusonus is one of those companies that has gone largely unheard of in respects to audio repair, which is a shame as their offerings are affordable, easy to use, and capable of producing quick results. Here’s a quick overview of their comprehensive ERA Bundles. The ERA Bundle Standard ($149) contains 4 single-knob plugins, each one solving a different audio problem:
● ERA Noise Remover
● ERA Reverb Remover
● ERA Plosive Remover
● ERA De-Esser
● ERA Reverb Remover
● ERA Plosive Remover
● ERA De-Esser
The Accusonus ERA Bundle Pro ($499) contains the 4 single-knob plugins as well as ERA D, a joint noise & reverb reduction plugin for post professionals.
You may be wondering about the steep upgrade when ERA-D does essentially the same things as the ERA Noise Remover and the ERA Reverb Remover. The secret here is that ERA-D does something that other tools don’t: 2-channel intelligent noise reduction. This means you can feed in 2 different channels (boom and lav, for instance) and the 2 channels will inform each other of the content, making for a much cleaner denoising process with fewer artifacts. If this fits your situation, I’d say it’s worth the small splurge for the top tier version.
The benefits of Accusonus’ tools is that you can run them in real-time and get results quick. The one-knob style functionality makes them extremely simple for non-audio geniuses to use. It’s definitely worth it for video editors, indie filmmakers or audio engineers who need a clean and quick solution.
Try it out for free and see for yourself.
iZotope RX (Standard/Advanced) – King of Audio Repair
RX is possibly the most well-known sound restoration software out today. Ever since version 1, iZotope has been pouring R&D into making this software unbeatable.
RX gives you a fully featured waveform and spectral editor with numerous ways to view and select your sound and a complete host of tools including:
- De-Noise
- De-Click
- De-Crackle
- De-Hum
- De-Clip
- De-Bleed (uses
- De-Plosive
- De-Ess (removes vocal sibilance with ease)
- De-Reverb
- De-Rustle
- De-Wind
- Interpolate
- Dialogue Isolate (algorithms shaped to lighten noise without introducing artifacts)
- Spectral De-Noise
- Voice De-Noise
- Mouth De-Click
- Deconstruct (the ability to filter and separate between tonal and broadband sounds)
- Ambience Match & Extraction (no room tone? no problem!)
- EQ Match
- Auto Leveler (time saver, helps you audio sound consistent without compression)
- Time & Pitch Manipulation
- Center Content Extraction
- Find Similar (uses machine learning to find sonic events in the recording that are similar to the one you’ve highlighted)
- Common Tools including: Gain, Phase, Normalize, Azimuth Correction, Panning, Resampling, signal Generator, etc
- Batch Processing (this is key if you have a lot of bad audio on a consistent basis)
Needless to say, iZotope’s flagship software can warrant an entire blog series on its own. If you are an indie filmmaker, video editor, sound engineer or sound designer, this software surely has a handful of tools that will be immediately useful in your everyday work. The advanced version will cost you a pretty penny, but if you can afford the standard version, you still get most of the available tools, minus just a few awesome ones.
Elements RX: $99
Standard RX: $299
Advanced RX: $999
Adobe Audition CC – The Editor’s Go-To Sound Tool
Many video editors will be quite familiar with Audition, as it comes bundled with the Creative Cloud suite (meaning many of you already have this available to you without spending an additional dime).
Audition is not just a noise reduction software, but a complete digital audio workstation, capable of multi-track editing, mixing, sound design, mastering and spectral audio editing. While the noise-reduction tools are relatively bare-bones compared to some other options, it likely has the tools you need the most:
- Click Removal
- Pop Removal
- Hum Removal
- Sound Removal (for odd, random sounds)
- Adaptive Noise Reduction (for constantly changing sounds, like an airplane fly-by)
- Hiss Removal
- Volume Leveling
- Pitch Correction
- Plus the entire suite of tools and plugins that Audition has to offer
These tools, along with their spectral editor (complete with photoshop-like selection tools), give you the ability to clean out most common sonic problems.
If you are a Premiere Pro editor on a budget, this is a no-brainer. Learn to use Audition as well as you do Premiere or After Effects, and you are golden. If you don’t have the Adobe CC suite, but you want Audition, it’ll cost you $20.99 per month.
Cedar Studio – Serious Audio Restoration
Cedar is the grandfather of noise-reduction, the first major competitor in the industry, and what most of the professionals use when lives are on the line, like in the case of forensic investigations.
Cedar’s tools are available in both software and hardware, with different tools for different purposes, such as live event noise-reduction where a zero-error and zero-latency solution is absolutely necessary, or in server setups where huge bulk processing must happen 100x faster than real-time to keep up with the huge amount of audio that needs to be processed.
But most studio professionals on this level would rely on Cedar Studio; their comprehensive set of software that works inside DAWs like Pro Tools. Of course, this bundle of tools will cost about $13,000, with each module costing no less than around $3,000 each. While many of the benefits of these tools can be found in cheaper software, the added top level of quality, speed and efficiency is a need reserved for a select few.
It’s likely that if you need Cedar, you aren’t reading this article, but it’s good to have knowledge of the software by which all the others will be judged in terms of quality and reliability.
Waves (WNS/W43/NS1/X-Noise/Z-Noise) – Quick Audio Cleanup
If you are an audio engineer, you likely know all about Waves plugins. They’ve been around a long time and have been a staple in every major music and post house all over the world. In that time, they’ve released some pretty great noise reduction plugins, which I’ll parse into 2 categories:
Intelligent:
- NS1
- W43
- WNS
Manual:
- X-Noise
- X-Hum
- X-Click
- X-Crackle
- Z-Noise
The manual plugins are their older suite of tools and have parametric features to dial in the threshold, band control, and more after you’ve taught the plugin what the noise print looks like.
The intelligent plugins are their newer tools that use advanced DSP logic to differentiate between signal and noise, allowing you to dial in the threshold and, in the case of W43 and WNS, adjust that threshold for multiple bands to dial it in a bit more.
The greatest part of their intelligent plugins is that they work really fast, with almost zero-latency. This means you can throw it on your audio track and not lose sync, which can be a huge time saver.
Of this toolset, W43 may have the best bang-for-the-buck, only costing $49 (depending on the day, as Waves is always having sales) and giving you a 4 band control. If you are in need of not only noise but click and hum removal, those plugins are priced around $89, or you can buy the entire intelligent set for $399.
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SOUND FORGE Pro 14 – Formerly MAGIX Spectral Layers Pro
A completely unique tool, Magix (who bought this software from Sony) offers what some may call the ‘photoshop-for-audio’. The software gives you a spectral view of your audio, advanced selection, brush, clone (yes, clone stamp for audio!) and erase tools, and the ability to extract separate items into ‘layers’ and process them individually.
While Sound Forge Pro gives extreme granularity to editing your audio that no other software really offers (even RX doesn’t offer some of these features, like drawing in frequencies, pitch shifting a single selected harmonic, or spectral casting/molding), this tool hasn’t quite caught on yet with professionals.
Of course, they also include tools for noise ‘fingerprinting’, but you won’t find the number of intelligent algorithms available for noise removal like you see in iZotope RX. Spectral Layers is all about manual control, and if you know how to view the spectrogram to find sound, and use the tools to manipulate it, you may be just as well off with this software.
For $399, Sound Forge Pro is an impressive tool that offers features unique in their own right and makes itself a valuable component in a sound editor’s toolkit.
Antares SoundSoap – Legendary & Simple Sound Cleaner
Soundsoap from Antares (yes, the auto-tune company) has come a long way since it was owned by BIAS (pre-2012) and has made itself one of the simplest, fastest and cheapest options for noise reduction. Despite BIAS no longer being around, the genius behind BIAS’ legendary tools is now CEO of Antares, so you can trust that the development of the software is in good hands.
With its most basic version starting at a one-time fee of $74.50 (none of that subscription nonsense), you get an intelligent noise reduction solution that will work in any professional audio or video editing software environment. While their $250 Soundsoap+ software offers some better algorithms and more fine-tuned control, for a down and dirty solution in the middle of a fast-paced video editing project, Soundsoap might be all you need.
Zynaptiq ‘Un-Series’ Repair Tools – Unique Sound Fixes
If you are looking for a more specific set of repair tools, you might want to look into Zynaptiq. Since its inception, this company has been focused on making tools that nobody else has made before. For their audio repair products, they offer the following tools:
Un-Veil: learn and reduce the effects of natural reverb in recordings
Un-Chirp: remove ‘watery’ artifacts caused by low bit-rate encoding and noise filtering
Un-Filter: ‘un-EQ’ your audio from things like resonances, comb-filtering, roll-offs and more.
If you don’t know much about audio restoration, know that these tools are making strides towards capabilities previously unseen in the industry. While not perfect, they do work surprisingly well considering the mathematical engineering feats required to create tools like these. Worth checking out if you have the money. The bundle for all 3 will run you about $799.
Additional Noise Reduction Tools
If you haven’t found anything in your price range, you’re in luck! There are lots of noise reduction plugins available. Many are similar to ones we’ve listed, but just didn’t make the cut, and are likely capable of doing what you need. Many others (usually bare-bones basic plugins) are also often included in software already, like Premiere Pro, Final Cut Pro X, and Audacity (a free audio application).
Do your research and find what works best for you in your price range and what is compatible with your software and your workflow. Know the difference between what intelligent reduction, manual noise-print reduction, and gating have to offer your sound. And keep in mind, not all of these plugins will work equally as well. Use your ears and listen for when you’re reducing too much noise. Nothing sounds worse than over-filtered audio files.
Remember, if you pick the right gear from the start, like low-noise microphones and recorders with low-noise preamps, your likelihood of needing noise-reduction will probably decrease a substantial amount. Check out our guides on buying a budget microphone or recorder to get you started.
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Chances are that if you work as an editor, sound designer or the like, you’re in need of a great source for sound effects for your projects. Soundsnap has 360,000+ professional sound effects (and music loops) across every category and is used by companies like HBO, Pixar, Vice, and more. We make purchase options flexible, allowing you to buy a few at a time or to pay for an entire year of unlimited downloads for just $199.
Having to reduce audio noise can be a real pain. And recording clean audio can be tough, especially in noisy environments.
Whether it’s background noise or less-than-ideal equipment, sometimes you end up with hissy audio. Luckily there is a free method to make your track easier on the ears.
Take a listen to what software noise removal can do:
Noisy Audio
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Clean Audio
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Before We Get Started: Room Tone
There is one tip that will help immensely with this process. If you are the one responsible for your recording, remember to record at least 10 seconds of “room tone”.
Room tone is simply a few seconds of recording the natural noise of the environment in which you’re recording (with no talking, nail filing, heavy breathing, etc.) Even if you can’t hear anything, a sensitive microphone will pick up ventilation noise, computer fans, and more.
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Taking “room tone” will serve as a baseline for the software to remove noise. Having a section of room tone in your recording is always a good practice but if you know you’ll be needing to do noise removal later definitely don’t forget! If you don’t have control of the recording process you can still usually find a bit of room tone in a recording.
You can find room tone in a break between takes or time at the beginning or end of the file where nothing much is happening and usually that’s enough to work with for noise removal purposes.
So how is noise removal actually done?
How to Reduce Audio Noise in Audacity
In this economy who wouldn’t take the free option when available? If you aren’t looking to invest in high-end audio software, Audacity is a free piece of software created and maintained by a community of programmers and audio experts.
It accepts a wide range of audio file types and has a perfectly serviceable noise removal tool. The one catch is it’s audio only, so if you’re working with video it may not be the smoothest workflow. More on that later…
Here’s how it works:
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How to reduce audio noise in Audacity
- Select your room tone or silent section from your audioDrag your mouse over an area with no (or little) audio.
- Select Noise ReductionUnder the Effect menu select Noise Reduction
- Get your Noise ProfileClick “Get Noise Profile” and the box will disappear.
- Select your entire audio clipSelect all of the audio that you want that background noise removed. Go to ‘Select’ and then click ‘All.’
- Repeat noise reductionGo to the Effect menu and select
- Listen to your clipMake sure your clip doesn’t sound muffled.
What the sliders do:
Noise Reduction: Controls the amount of reduction of your noise volume.
Sensitivity: Controls the range of what noise removal considers noise. The higher this goes the more your actual audio (such as voices) will be affected.
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Frequency smoothing: The default setting is setting is 3, settings lower than this tend to favor music and higher settings tend to favor spoken word.
I’ll tell you the same thing I tell my Uncle Mike when we go to White Castle: Go easy on the sliders! Small changes can make a big difference.
Reduce and residue buttons: Reduce is what you’ll want for a good preview. It plays what the audio will sound like with noise removed. If you want to hear exclusively what the noise reduction is taking out, select residue and click preview.
How to clean up audio in video editing
Audacity is great for cleaning up audio for a podcast or music. But for vocal tracks in video, it’s time-consuming to export your audio tracks, clean them up in Audacity, and re-sync your audio and video again.
It’s not impossible but it’s not the most efficient way to remove noise, especially if you’ve already cut up your clips in the timeline.
Camtasia (video editing software) has a noise removal feature built-in which is dead simple. It still works with your room tone but it’s not necessary to select the section on your clip, Camtasia will do that for you.
The sensitivity slider in Camtasia works the same as in Audacity. The “Amount” slider is equivalent to the Noise Reduction slider in Audacity.
By removing noise on the timeline you save the trouble of importing and exporting back and forth from an external program like Audacity, and it’s much easier to make changes quickly.
By removing noise on the timeline you save the trouble of importing and exporting back and forth from an external program like Audacity, and it’s much easier to make changes quickly.
Next Steps
There are other programs with similar processes such as Adobe Audition and the very powerful Izotope RX5.
These programs edge into the professional realm of audio tools and allow you to go much further with audio sweetening if you’re willing to put the time and money in to learn them.
Just remember while software continues to get better at saving audio, doing everything you can to minimize noise in the initial recording will always be your best bet.
Free Trial: You can try any of our screen recorders for free. Get everything you need to record on your Windows, Mac, and iOS devices.
Editor’s Note: This post was originally published in 2016 and has since been updated for accuracy and comprehensiveness.