- The metallic, tin-like sound you may hear in your audio is an unwelcome annoyance. All audio editing platforms like Audacity, Adobe Audition, and AVID have tools to help, but it’s not a sure fix. In Audacity, which is a free open source audio recording and editing application, you can use their “equalization” effects tool.
- So, i got this weird crackling audio when i plug in my Razer Ripsaw into my pc, but the crackling only start when i activate my capture card. Also i've tried changing the usb port and install a powered usb hub and it seems the crackling won't go away. And as you can see in here the cpu is not.
The crackling can be disturbing, but remember it is working to soften the wax in your ear. The longer you let it work the easier it will be to remove. Tilting you head so that drops can run back out will sometimes make the crackling noise go away. However, if it continues you will need to flush your ear with some lukewarm water. I tried to remove the realtek driver, which was replaced by intel sound driver, and I still got crackling sound. Also, I made a video with the Windows key+G function. I capture the crackling sound, but when I played back the recorded video, no crackling sound on that video.
One of the greatest challenges every engineer faces is unwanted noise. As we know from discussing studio soundproofing, bending sound to our will takes a bit of effort. The nature of recording means that sometimes unwanted ambiance or other sounds will find a way in. And if you lack proper soundproofing, this battle becomes that much more difficult. Fortunately, we have a remedy: noise removal.
How does noise removal work?
With any signal comes noise. The stronger the signal, the less noise. But no signal lacks noise entirely. So, some smart engineers began looking for ways to reduce as much noise as possible in any given signal. Effective noise reduction techniques in music production began in the 1960s with Ray Dolby. At that time, the Dolby Tape A method emphasized four frequency bands during recording, then lowered them during playback. A decade later Philips came up with its own noise removal method, dynamic noise limiting (DNL). This circuitry could affect any source when played back, making it widely popular.
These early pioneers of noise removal paved the way for more recent digital noise removal algorithms and plugins. However, the principle remains the same from the ’60s to now. Without getting too technical, noise removal programs hone in on specific frequencies, either during recording or playback. Once targeted, the level of these frequencies can be reduced. You can determine how much you want to reduce these frequencies by setting parameters, as well as what you don’t want to be affected.
What causes unwanted noise?
In short, energy. We don’t live in a vacuum out in space. The air around us carries sound waves. Also, anything that produces or uses electricity gives off a subtle (or not so subtle) hum. This could be your refrigerator down the hall, your Peavey 6505+, or the audio cables for your direct input bass track. Some ambient sound will creep into even the most vacuum sealed, soundproofed lockbox of a studio.
Aside from background noise, clicks, crackles, and pops can occur for a variety of reasons. When recording vocals or voiceovers, these noises can occur simply from mouth movements. The slip of a tongue or lip can result in some crazy (and funny) noises. Besides human error, electronic glitches with cables, DAWs, preamps, and any other piece of gear can also yield some startling roars.
The good news here is that most of these hums, hisses, clicks, and crackles are either brief or consistent. For instance, background noise given off by a circuit usually hums around the same frequency throughout. Miroslav philharmonik 2 manual pdf. And crackles or pops typically only last a fraction of a second. These facts make noise removal much easier.
Different techniques to remove or reduce noise
The advent of noise removal opened the door for much higher quality recordings. But with great power comes great responsibility. If we consider how noise removal works, it becomes clear that going too far could seriously interfere with the raw audio, eliminating wanted frequencies or idiosyncrasies. On the other hand, playing it safe won’t do much to enhance the audio quality. Let’s look at some methods for reducing noise, and how to strike that perfect balance.
1. Noise removal tools in audio editors
The free audio editing program Audacity offers its own noise removal effect. The noise removal software analyzes a selected portion of audio that features the unwanted sound (“Get noise profile”). Once it collects this data, the program will pick out that specific noise and reduce its prevalence in another selected segment. You can change some parameters like the amount of noise reduction, sensitivity, smoothing, and attack/release time.
For a free effect within a free program, this noise remover does a great job, though it takes some time to get used to the parameters. One drawback of this method is that it destructively alters the audio. You can always undo any change you make, of course, but any final change augments the waveform permanently. So always keep a copy of the raw audio if using an audio editor.
Some of the best audio editing programs feature powerful noise removal tools out of the box. Both SoundForge Pro and WaveLab Pro include their own versions of noise removal technology. The former has a DeHisser and DeClicker. The latter offers a DeClicker, DeCrackler, DePopper, DeBuzzer, and DeNoiser. Each of these is designed for specific types of unwanted noise and can greatly improve a muddy mix.
2. Gating and automation
Though technically not a noise removal tool, noise gates can come in handy for reducing unwanted sound when there’s no signal. A noise gate works a lot like a compressor or limiter. Basically, you set the threshold so that no sound below that level can enter. This way you can prevent a subtle hiss from making its way into your recording. Parameters like attack, release, and hold can be adjusted. Some modern noise gate plugins feature a lookahead option, which turns the gate on just before transients.
Automation offers another option. Using mix automation to reduce noise shouldn’t be your first option unless you’re dealing with a very short sample. For instance, if you’re editing a voiceover line or two, using automation to silence the passages between sentences can make a big difference. Or maybe one signal is hotter than another, resulting in increased amplitude and noticeable hiss. You can use automation to bring these sections down as well. It won’t eliminate the hiss, but it provides a good start.
3. High-end plugins
In addition to the built-in tools of audio editors and DAWs, several great noise reduction plugins exist as well. Waves boasts two of the most effective ones: X-Noise and WNS Noise Suppressor. X-Noise primarily deals with unwanted hiss in audio tracks. The simple layout gives you all the control you need: threshold, attack/release, shelf, and gain reduction. The WNS plugin goes even further, and really comes in handy in post-production. The plugin offers six bands of real-time suppression control, full automation, recall, and more. Other great plugins include Cedar Audio DNS One, iZotope RX2 and Sonnox Oxford Denoiser.
Conclusion
While the terms “noise removal” and “noise reduction” are used synonymously, the latter is a bit more accurate. The truth is, you simply can’t remove 100% of unwanted noise. You can get pretty darn close, where only Superman or a really healthy dog could discern it. A good mix with proper EQ and filtering will also mask a good deal of hiss or background noise.
So just remember that when it comes to any recording, the front-end comes first. No amount of post-production mastery can completely fix a bad recording filled with hisses and pops. Ask yourself, are your cables functioning well? Is your CPU fast enough? Is your room properly treated and soundproofed? In addition to these questions, consider what type of mix you’ll want in the end. If you desire a raw sound, some background noise might not break the recording. But a squeaky clean mix will require more refinement. In this way, noise removal is as much an artistic choice as a technical necessity.
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AudioLava is the ideal audio cleaning software for restoring and recording high quality audio from LP or tape to CD. The new version now runs on both Macintosh and Windows PCs and comes with a modern dark theme that appears crystal sharp on retina style displays. The user friendly interface helps to find the best way to bring old recordings back to life and guides the user through all the steps from recording, file import and track splitting to restoration and CD burning.
You can remove noise such as tape hiss, hum or clicks and crackle on LP records as well as improve clipped audio. The algorithms are based on our award winning audio restoration technology, but offers a simplified user interface that makes the restoration process easier.
Recordings are automatically split into separate tracks, which can also be edited manually. The large set of integrated tools range from dynamic processing and equalization to highly realistic reverb. Plug-ins in the VST, VST3 and AU (Mac only) formats are supported. Real time processing simplifies fine tuning of the parameter settings. The restored recordings can be burned as audio CDs or saved to audio files on the computer in a variety of formats, including WAV, MP4, MP3, Ogg and FLAC.
Downloads
Purchase LinksFull Versions
Upgrades
Press ReviewsCHIP Grade: Excellent (1.3) CHIP 08 | 2018 |
Audio Crackle Removal Service
- The start page of the wizard style user interface in AudioLava 2.
- The repair page in AudioLava 2 showing the audio waveform, track list, restoration tools and the processing chain.
Dr. David Smith from Film, video and VR reviews AudioLava 2.x. |
AudioLava 2 has been re-implemented from scratch for the highest quality demands and cross-platform support and is now also available on Mac and as 32 and 64 bit applications on Windows. A large range of new features and usability improvements are implemented.
- Available for Mac, Windows 32 bit and Windows 64 bit
- Redesigned and modern looking user interface
- Better quality restoration tools based on the acclaimed Acon Digital Restoration Suite
General Features
- Runs on Mac and Windows (32 bit and 64 bit versions available)
- Supports ASIO, Windows Audio (exclusive and non-exclusive) and DirectSound driver models under Windows and CoreAudio on Mac
- Automatic track splitting
- Timer and input level triggered recording
- Real-time preview
- Preset manager that allows you to store user presets for all integrated audio processing tools
Real-time Analyzers
- Level meter with peak, peak hold and RMS indicators
- Level meter modes include K-20, K-14, K12 and digital full scale
- Spectrum analyzer
- Loudness meter (EBU R-128 compliant)
- Phase correlation meter
- Time display
Restoration Tools
- DeNoise
- DeClick
- DeCrackle
- DeClip
- DeHum
Plug-in Formats
- VST
- VST3
- AU (Mac only)
Other Audio Processing Tools
- Software emulation of RIAA phono pre-amplifier
- 12 band parametric equalizer (Equalize Light)
- Dynamics (compressor, expander and gate)
- Limit
- Dither
- Channel mixer for stereo image adjustments
- Highly realistic reverb
- Convolution reverb
- Echo
- Multiply (Chorus effect)
File Formats
- Wave Audio (WAV)
- AIFF
- MP3
- MP4 Audio
- Ogg Vorbis
- FLAC
- WMA (Windows only)
CD Projects
- Integrated audio CD burning
- Disc At Once burning (DAO)
- Supports buffer under-run protection schemes
Before you install AudioLava, please make sure your computer fulfills the following requirements:
PC Version (Windows)
- Windows 7 / 8.x / 10
- Intel Core i3 or AMD multi-core processor (Intel Core i5 or faster recommended)
- 1366 x 768 display resolution (1920 x 1080 or higher recommended)
- 1 GB RAM (4 GB or more recommended)
- 1 GB free HD space
Macintosh Version (OS X)
Audio Crackle Removal Software
- OS X 10.8 or later
- 1 GB RAM (4 GB or more recommended)
- 1 GB free HD space