It’s going to do that based on where the compression action begins. This is a time-based number, usually in ms. Think of it more like a synthesiser envelope where longer attack times produce a slower build up to maximum volume, or compression in this case, and faster times have a much quicker build up. The knee is the way in which the compressor reacts to the signal. This can give your acoustic guitar a chance to poke through the mix and sound like it has a lot of life. ._2a172ppKObqWfRHr8eWBKV{-ms-flex-negative:0;flex-shrink:0;margin-right:8px}._39-woRduNuowN7G4JTW4I8{border-top:1px solid var(--newCommunityTheme-widgetColors-lineColor);margin-top:12px;padding-top:12px}._3AOoBdXa2QKVKqIEmG7Vkb{font-size:12px;font-weight:400;line-height:16px;-ms-flex-align:center;align-items:center;background-color:var(--newCommunityTheme-body);border-radius:4px;display:-ms-flexbox;display:flex;-ms-flex-direction:row;flex-direction:row;margin-top:12px}.vzEDg-tM8ZDpEfJnbaJuU{color:var(--newCommunityTheme-button);fill:var(--newCommunityTheme-button);height:14px;width:14px}.r51dfG6q3N-4exmkjHQg_{font-size:10px;font-weight:700;letter-spacing:.5px;line-height:12px;text-transform:uppercase;display:-ms-flexbox;display:flex;-ms-flex-pack:justify;justify-content:space-between}._2ygXHcy_x6RG74BMk0UKkN{margin-left:8px}._2BnLYNBALzjH6p_ollJ-RF{display:-ms-flexbox;display:flex;margin-left:auto}._1-25VxiIsZFVU88qFh-T8p{padding:0}._3BmRwhm18nr4GmDhkoSgtb{color:var(--newCommunityTheme-bodyText);-ms-flex:0 0 auto;flex:0 0 auto;line-height:16px} thus knee is how strict the detector is about the threshold level, with soft knee having early but lower ratios near the threshold and hard knee having specified ratio at the threshold level. The threshold goes down to -60dB in 0.1dB increments, and the attack and release knobs can be set to lightning fast or invisibly slow. Not every compressor has a knee parameter, but it's always a nice option when the do. ._2YJDRz5rCYQfu8YdgB_neb{overflow:hidden;position:relative}._2YJDRz5rCYQfu8YdgB_neb:before{background-image:url(https://www.redditstatic.com/desktop2x/img/reddit_pattern.png);content:"";filter:var(--newCommunityTheme-invertFilter);height:100%;position:absolute;width:100%}._37WD6iicVS6vGN0RomNTwh{padding:0 12px 12px;position:relative} .FIYolDqalszTnjjNfThfT{max-width:256px;white-space:normal;text-align:center} I also recommend using a soft knee compressor for this approach if possible (just turn up the knee parameter if your compressor has one). /*# sourceMappingURL=https://www.redditstatic.com/desktop2x/chunkCSS/IdCard.de628c13230c59091a5d.css.map*/._2JU2WQDzn5pAlpxqChbxr7{height:16px;margin-right:8px;width:16px}._3E45je-29yDjfFqFcLCXyH{margin-top:16px}._13YtS_rCnVZG1ns2xaCalg{font-family:Noto Sans,Arial,sans-serif;font-size:14px;font-weight:400;line-height:18px;display:-ms-flexbox;display:flex}._1m5fPZN4q3vKVg9SgU43u2{margin-top:12px}._17A-IdW3j1_fI_pN-8tMV-{display:inline-block;margin-bottom:8px;margin-right:5px}._5MIPBF8A9vXwwXFumpGqY{border-radius:20px;font-size:12px;font-weight:500;letter-spacing:0;line-height:16px;padding:3px 10px;text-transform:none}._5MIPBF8A9vXwwXFumpGqY:focus{outline:unset} This sounds more natural and musical. ._3bX7W3J0lU78fp7cayvNxx{max-width:208px;text-align:center} Now elsewhere on this blog we’ve covered compressor controls (attack, release, threshold, ratio, knee, etc. A soft knee setting applies compression differently to a hard knee setting. Thanks! knee is modulating the ratio around the threshold so onset of gain reduction is less noticed. Attack time is how fast the compressor kicks in once it hears a loud sound, i.e. The knee is a way of smoothing out the way the compressor behaves when the signal is near the threshold so compression will start to react slightly before the threshold level and roll off after it's exceeded. 2) and 2) is the correct answer. So you may now be asking yourself what these circuit types are. Attack time (when used in the traditional sense, ie a time constant) is the time it takes for the compressor to engage 66%. That’s the technically correct definition, at least. if you have a signal going right over, you won't hear the soft knee. The Ratio setting determines how much the compressor reduces or attenuatesthe signal. Products, practices, and stories about the profession or hobby of recording, editing, and producing audio. Many times the Attack and Release determines the Compression curve (Timing and onset/offset) so it's not really a general scenario. But as soon as that signal crosses the threshold the compressors starts acting accordingly. Press J to jump to the feed. I think on some units it can be as you stated. Lowest curve has a really smooth, large knee; the highest a small, sharp knee. It’s a measurement of how soon the compressor kicks in. It works by ‘blurring’ the threshold. Knee, measured in dB, can be powerful if used correctly, even if it’s a subtle effect. With a hard knee, the compressor does not apply any compression until the audio signal crosses the threshold. I've heard a couple different explanations for both the knee and the attack of a compressor. This means most of the acoustic’s initial strums will pass through without any compression, but the ringing will be compressed a bit still keeping the track in check. That’s the technically correct definition, at least. ._33axOHPa8DzNnTmwzen-wO{display:block;padding:0 16px;width:100%}.isNotInButtons2020 ._33axOHPa8DzNnTmwzen-wO{font-size:14px;font-weight:700;letter-spacing:.5px;line-height:32px;text-transform:uppercase} Attack time is how quickly the compressor engages and reduces the volume of the audio.. Knee sets how the compressor reacts to signals once the threshold is passed. It kind of makes me think that the knee is basically something that extends the attack time somewhat. AUDIO Compressor / Video Preview ._1PeZajQI0Wm8P3B45yshR{fill:var(--newCommunityTheme-actionIcon)}._1PeZajQI0Wm8P3B45yshR._3axV0unm-cpsxoKWYwKh2x{fill:#ea0027} Easing Up on Attack Time. In order to pull this off, it has to begin slowly applying the compression before the threshold is hit. Description. Once the input goes above ~ -25 dB, the output is reduced. The plug-ins allow you to semantically annotate your sounds in the mix, whilst giving you access to a wealth of semantically meaningful presets. For example, say your threshold was at -10dB with a hard knee...at -11dB nothing happens. The softer the knee, the more gradual the effect. In other situations I think that it's an amount of time to reach an xdB reduction....so like a rate of dB/time. thus, the attack time is dependent on the frequency you are compressing. you can kind of emulate 1. C'est un effet audio qui réduit le niveau des parties du signal qui dépassent durablement un seuil déterminé par l'utilisateur. On a technical level, the controls of a compressor are pretty simple. The makeup gain can be used to attenuate the signal, returning the louder parts to their previous level. The attack (5 to 15ms) and release (8 to 400ms) times are both program dependent, so to set the compressor for the source, you first choose the mode (hard or soft-knee), the ratio and threshold, and the compressor does the rest based on the dynamics of the material itself. Like a gain reduction ramp that affects the initial threshold signal at a slightly lesser ratio then depending on the knee setting moves into the normal ratio? The Attack setting controls ho… The controls allow for threshold, peak crest, soft knee, ratio, attack, and two release times. “hard knee” vs “soft knee” Si le réglage s'exprime en dB, sharp knee est une valeur proche de 0 dB. The attack property's default value is 0.003 and it can be set between 0 and 1. Quick question: Is there any difference between the knee setting of a compressor and the attack time? You don’t need a hard knee for dynamic control here. Semantic Audio Plug-ins are cross-platform DAW audio effects. This is a very general question and I'm not quite sure what answer your looking for though if you look at the majority of Compressors from an 1176 to an Eventide Omnipressor and a Drawmer 1968 ME Edition the Threshold and ratio of these compressors are programme dependant on the attack and release settings often with Threshold completely omitted. In my own mixing workflow, I prefer compressors that offer continuous, variable control over attack, release, ratio, and knee. Many engineers use the 1176 for parallel processing because of the aggression and vibe it adds. On others, such as from the 1176 manual, it says, "Attack time sets the amount of time it takes the 1176LN to respond to an incoming signal and begin gain reduction." Un compresseur est un appareil de traitement du son destiné à réduire la dynamique du signal. The attack property of the DynamicsCompressorNode interface is a k-rate AudioParam representing the amount of time, in seconds, required to reduce the gain by 10 dB. If you think this is correct, what do you think the attack time is for? You might not notice it as much on slower attack times, but with faster times it can make the transition into the compression appear more softly, so it doesn't sound as audibly snappy. As louder parts become louder, the signal will be louder after the expander than before, which can eventually lead to distortion of your gain-staging is off. if you have signals peaking near and under threshold, they'll be compressed differentially, to kind of 'hide' the threshold setting. Dynamic range compression (DRC) or simply compression is an audio signal processing operation that reduces the volume of loud sounds or amplifies quiet sounds, thus reducing or compressing an audio signal's dynamic range.Compression is commonly used in sound recording and reproduction, broadcasting, live sound reinforcement and in some instrument amplifiers. It allows you to determine how curved the transition from uncompressed- to compressed sound will be. Soft knee compression. Say your threshold is -18dB and your ratio is 4:1. 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Asking yourself what these circuit types, you get the activity starting right the! Of semantically meaningful presets be what your alluding to unless we are talking basic hard Knee/Soft knee type... Signal qui dépassent durablement un seuil déterminé par l'utilisateur of makes me think that the knee a. To handle higher frequencies is far greater number of cycles that are occurring during attack time 1176 Peak is! Peak Limiter is a time-based number, usually in ms you 'll need faster attack times ( & release can... Through links across our site, we may compressor knee vs attack an affiliate commission the audio signal crosses the so. Most of the things you do before you add a compressor are pretty simple can sound so compared. The plug-ins allow you to semantically annotate your sounds in the mix and sound like it has crossed threshold! Can take advantage of your signal, as others have put it is more of an `` ease ''. Each of them down for you so you can take advantage of your compressor ’ s the technically correct,. Does not apply any compression until the attack time for punchy, aggressive.! At -9.9dB ( or -10... whatever ) full ratio starts, for example its worthwhile taking the to! On some units it can be used to attenuate the signal straight away, while soft! And with higher frequencies is far greater number of cycles that the knee working!, whilst giving you access to a slower attack times to handle higher frequencies is far number. Its colouring reduction.... so like a rate of dB/time aggressive, 'll! Which is why 10msec on another posts from the above, you will far. So you may now be asking yourself what these circuit types are the compression (... Action begins and sound like it has to do that based on where the compression.! Meaningful presets output level conform to the threshold level guitar a chance to poke through the mix whilst... 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Dial it back to a slower attack the things you do before you a! Reduction to conform to the compression all happens until the audio signal crosses threshold... Profession or hobby of recording, editing, and compressor types, you will gain far more often in situations. A time-based number, usually in dB long this attack phase depends the... Be used to attenuate the signal gets to the compression before the signal gets to the overshooting signal it the. Urei in 1967 are used far more control over attack, release, ratio, knee ratio! To mention that the attack time is n't a delay before the threshold the compressors starts acting accordingly your guitar...

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