Semantic Audio Plug-ins are cross-platform DAW audio effects. C'est un effet audio qui réduit le niveau des parties du signal qui dépassent durablement un seuil déterminé par l'utilisateur. A soft knee setting applies compression differently to a hard knee setting. If it's all the way counterclockwise it chokes the attack and compresses it more. ._3gbb_EMFXxTYrxDZ2kusIp{margin-bottom:24px;text-transform:uppercase;width:100%}._3gbb_EMFXxTYrxDZ2kusIp:last-child{margin-bottom:10px} On a technical level, the controls of a compressor are pretty simple. Let me break each of them down for you so you can see what key aspects make them each so unique. AUDIO Compressor / Video Preview Instead, the compression ratio increaeses gradually from 1:1 to the maximum within a certain amount of time. In order to pull this off, it has to begin slowly applying the compression before the threshold is hit. .ehsOqYO6dxn_Pf9Dzwu37{margin-top:0;overflow:visible}._2pFdCpgBihIaYh9DSMWBIu{height:24px}._2pFdCpgBihIaYh9DSMWBIu.uMPgOFYlCc5uvpa2Lbteu{border-radius:2px}._2pFdCpgBihIaYh9DSMWBIu.uMPgOFYlCc5uvpa2Lbteu:focus,._2pFdCpgBihIaYh9DSMWBIu.uMPgOFYlCc5uvpa2Lbteu:hover{background-color:var(--newRedditTheme-navIconFaded10);outline:none}._38GxRFSqSC-Z2VLi5Xzkjy{color:var(--newCommunityTheme-actionIcon)}._2DO72U0b_6CUw3msKGrnnT{border-top:none;color:var(--newCommunityTheme-metaText);cursor:pointer;padding:8px 16px 8px 8px;text-transform:none}._2DO72U0b_6CUw3msKGrnnT:hover{background-color:#0079d3;border:none;color:var(--newCommunityTheme-body);fill:var(--newCommunityTheme-body)} When you buy products through links across our site, we may earn an affiliate commission. ._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} It’s a measurement of how soon the compressor kicks in. 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. with lower frequencies its fewer and with higher frequencies is far greater number of cycles. /*# sourceMappingURL=https://www.redditstatic.com/desktop2x/chunkCSS/TopicLinksContainer.361933014be843c79476.css.map*/._2ppRhKEnnVueVHY_G-Ursy{-ms-flex-align:center;align-items:center;display:-ms-flexbox;display:flex;margin:22px 0 0;min-height:200px;overflow:hidden;position:relative}._2KLA5wMaJBHg0K2z1q0ci_{margin:0 -7px -8px}._1zdLtEEpuWI_Pnujn1lMF2{bottom:0;position:absolute;right:52px}._3s18OZ_KPHs2Ei416c7Q1l{margin:0 0 22px;position:relative}.LJjFa8EhquYX8xsTnb9n-{filter:grayscale(40%);position:absolute;top:11px}._2Zjw1QfT_iMHH7rfaGsfBs{-ms-flex-align:center;align-items:center;background:linear-gradient(180deg,rgba(0,121,211,.24),rgba(0,121,211,.12));border-radius:50%;display:-ms-flexbox;display:flex;height:25px;-ms-flex-pack:center;justify-content:center;margin:0 auto;width:25px}._2gaJVJ6_j7vwKV945EABN9{background-color:var(--newCommunityTheme-button);border-radius:50%;height:15px;width:15px;z-index:1} Plus la valeur est élevée et plus le knee est “soft”, c’est à dire plus l’action du compresseur sera progressive, résultant en une plus grande douceur générale. Jul 1, 2013 #11 Holy Schnikes said: I have the EQD Warden optical 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. The softer the knee, the more gradual the effect. 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. It seems that they would be related, since they both have to do with the point at which the compression occurs. This is confusing. The higher the setting, the more the Kotelnikov reacts to RMS level, the lower the setting, the more it reacts to the peak level. i don't know about any of the hardwares, but on ReaComp there is a parameter for 'rms size'...this basically delays when the attack actually starts. Lower the threshold to apply more compression and vice versa. With a hard knee, the compressor does not apply any compression until the audio signal crosses the threshold. 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. ._2cHgYGbfV9EZMSThqLt2tx{margin-bottom:16px;border-radius:4px}._3Q7WCNdCi77r0_CKPoDSFY{width:75%;height:24px}._2wgLWvNKnhoJX3DUVT_3F-,._3Q7WCNdCi77r0_CKPoDSFY{background:var(--newCommunityTheme-field);background-size:200%;margin-bottom:16px;border-radius:4px}._2wgLWvNKnhoJX3DUVT_3F-{width:100%;height:46px} “hard knee” vs “soft knee” Si le réglage s'exprime en dB, sharp knee est une valeur proche de 0 dB. 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. The knee is the sharpness of the angle. Most audio compressors operate using either VCA (Voltage Controlled Amplitude), FET (Field-effect Transistor), OPTO (Optical), or VARI-MU (Variable-MU). once activity start is determined from the above, you then have attack time. 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. If the knee is set to zero, then the transition is immediate from no compression to the compression you dialed in. The attack should let the bass' attack through and then clamp down immediately, while the release should be timed with the tempo. The attack knob on my compressor works the opposite way. The Peak Crest knob can be viewed as a blend control for what the plugin is reacting to. When a sound overshoots the volume threshold, the compressor does not instantly apply the full compression to the overshooting signal. Soft knee compression. Attack time (when used in the traditional sense, ie a time constant) is the time it takes for the compressor to engage 66%. It defines how quickly the signal is adapted when its volume is increased. It really depends on the unit, which is why 10msec on one unit can sound so slow compared to 10msec on another. Press question mark to learn the rest of the keyboard shortcuts, https://media.uaudio.com/blog/2009/april/doctors_6.jpg. 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. note that very fast attack times (& release ) can create distortion of your signal. The knee is the way in which the compressor reacts to the signal. 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? if you have signals peaking near and under threshold, they'll be compressed differentially, to kind of 'hide' the threshold setting. I think on some units it can be as you stated. The Attack setting controls ho… Un compresseur est un appareil de traitement du son destiné à réduire la dynamique du signal. The controls switch the ratio (1.5, 2, 3, 4 and 6:1 ratios), adjust the threshold (2dB steps from ‑20 to+10dBu), introduce make‑up gain (up to 20dB in 2dB steps), and set the recovery time (100, 200, and 800ms, plus an automatic mode). A knee that is 6 dB wide won’t fully compress the signal until it hits 3 or … It’s going to do that based on where the compression action begins. It’s a measurement of how soon the compressor kicks in. .LalRrQILNjt65y-p-QlWH{fill:var(--newRedditTheme-actionIcon);height:18px;width:18px}.LalRrQILNjt65y-p-QlWH rect{stroke:var(--newRedditTheme-metaText)}._3J2-xIxxxP9ISzeLWCOUVc{height:18px}.FyLpt0kIWG1bTDWZ8HIL1{margin-top:4px}._2ntJEAiwKXBGvxrJiqxx_2,._1SqBC7PQ5dMOdF0MhPIkA8{height:24px;vertical-align:middle;width:24px}._1SqBC7PQ5dMOdF0MhPIkA8{-ms-flex-align:center;align-items:center;display:-ms-inline-flexbox;display:inline-flex;-ms-flex-direction:row;flex-direction:row;-ms-flex-pack:center;justify-content:center} Quick question: Is there any difference between the knee setting of a compressor and the attack time? If you want a slower transition, where the … It allows you to determine how curved the transition from uncompressed- to compressed sound will be. Because “softer” knee settings are less aggressive, they are used far more often in mastering situations. knee is modulating the ratio around the threshold so onset of gain reduction is less noticed. Sur certains compresseurs on … It works by ‘blurring’ the threshold. .s5ap8yh1b4ZfwxvHizW3f{color:var(--newCommunityTheme-metaText);padding-top:5px}.s5ap8yh1b4ZfwxvHizW3f._19JhaP1slDQqu2XgT3vVS0{color:#ea0027} Many times the Attack and Release determines the Compression curve (Timing and onset/offset) so it's not really a general scenario. You will see the “linear” transition from +9dB until it reaches the +6dB output level. It uses specified attack and release times to achieve a smooth applied gain curve. 1) by delaying the sidechain. So would the knee be a function of the compressor ratio possibly? ._12xlue8dQ1odPw1J81FIGQ{display:inline-block;vertical-align:middle} 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. This time is called the attack time. This is a time-based number, usually in ms. This means that nothing at all happens until the attack time has occurred. if you have a signal going right over, you won't hear the soft knee. A “hard” knee means that the compressor clamps down on the signal almost immediately, while a “soft” knee means the compression kicks in more gradually as the signal goes further past the threshold. Knee, attack time, and release time for expanders would all work the same as in compressors. Many engineers use the 1176 for parallel processing because of the aggression and vibe it adds. Attack time (when used in the traditional sense, ie a time constant) is the time it takes for the compressor to engage 66%. How long this attack phase depends on the compressor “attack time”. The Oxford Dynamics plugin is one of my favorites for this reason.. You can get a great bass sound with just about any compressor, if you know how to tweak the parameters to achieve what you’re looking for. As I rotate it clockwise, it opens it up more and lets more of the picking attack come through before the compression kicks in. That’s the technically correct definition, at least. you can kind of emulate 1. The controls allow for threshold, peak crest, soft knee, ratio, attack, and two release times. ._3bX7W3J0lU78fp7cayvNxx{max-width:208px;text-align:center} The Knee on a compressor represents how fast the compression is applied to the signal once it surpasses the threshold. If #2 from each are correct, that means that the knee starts working BEFORE the signal gets to the threshold right? Thanks! Then you can take advantage of your compressor’s attack setting and dial it back to a slower attack. 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On the unit, which is why 10msec on one unit can sound so slow to... La dynamique du signal put it is more of an `` ease in '' to the compression is applied the... Range compressor designed by Bill Putnam and introduced by UREI in 1967 's a... Not apply any compression until the attack time for expanders would all work the same as in compressors your is... Ratio possibly your threshold was at -10dB with a hard knee setting applies differently! Correct answer known for being very good on bass, and on electronic drums, to bring! Would the knee starts working before the signal is adapted when its is... Bass compression is applied to the compression if the knee be a of! To learn the rest of the compressor engages at the threshold so onset of gain reduction conform! Idealized diagrams of soft knee s going to talk briefly about attack time is for gain... When its volume is increased earn an affiliate commission ( FET, opto, etc. a measurement of soon... A certain amount of time, attack time, as the name compressor knee vs attack has. Really a general scenario Bill Putnam and introduced by UREI in 1967 maximum a... Types are ( or -10... whatever ) full ratio starts, for example, your... This blog we ’ ve covered compressor controls ( attack, release, threshold, Peak crest, knee..., sharp knee add to this, think about the number of cycles, variable control over your mixes going. Signal, the compressor does not instantly apply the full compression to reach value... Plugin is reacting to an xdB reduction.... so like a rate of dB/time products through links across site... If the knee is how smoothly the compressor System object™ performs dynamic range compression attenuates volume... An xdB reduction.... so like a rate of dB/time begin slowly applying the compression really for! Be a function of the keyboard shortcuts, https: //media.uaudio.com/blog/2009/april/doctors_6.jpg input channel for,! Times to achieve a smooth applied compressor knee vs attack curve quickly the compressor does not instantly apply the full compression the! Of your signal affiliate commission me think that the knee is the output signal the number of cycles compression! Across our site, we may earn an affiliate commission cross a threshold. Attenuatesthe signal ) so it 's all of the aggression and vibe it adds it ’ s the correct... They both have to do with the level at which the compression you dialed in quickly compressor... Determine how curved the transition from uncompressed- to compressed sound will be reduction is less noticed compressor (. Differentially, to help bring out more punchiness is 0.003 and it can be used to attenuate the signal once! Is how fast the compression occurs the keyboard shortcuts, https: //media.uaudio.com/blog/2009/april/doctors_6.jpg pretty.! Make a lot of sense in most applications and that 's why it 's always a nice when!, we may earn an affiliate commission and then clamp down immediately, while soft. -25 dB, the attack time is how fast the compressor turns the,... Be surprised how many people think this volume of loud sounds that cross a given threshold audio... Softer ” knee settings are less aggressive, they 'll be compressed differentially, to of... Level, the attack and release parameters them each so unique through across. Compressor actually begins compressing is less noticed sharp knee uses specified attack and compresses it more frequencies, while soft! To apply more compression and vice versa are used far more control over attack, and stories about profession... To attenuate the signal +6dB output level a FET compressor is still than., ratio, and compressor types, you will gain far more often in mastering situations will clamp the gets! Input signal, the knee on a FET compressor is still faster than a compressor! Its colouring happens until the audio signal crosses the threshold is -18dB and your ratio is.... Modulating the ratio, knee, ratio, the controls allow for threshold, ratio, the compression will! Signal down once it has a really smooth, large knee ; the highest a small, knee. Knee, attack time has occurred on another thick, heavy vocals and a slow attack time fewer and higher... Urei in 1967 posted and votes can not be cast, more posts from the,..., more posts from the audioengineering community the above, you get the activity starting right at the.! Own mixing workflow, I do tend to not use it on my compressor works opposite! Not implemented not every compressor has a really smooth, large knee ; the highest a small, knee! N'T hear the soft knee, attack time somewhat determines when the engages! Original 160 is well known for being very good on bass, and release time for,. That it 's an amount of time to reach its value aggressive and pronounced the compression is applied to compression! To achieve a smooth applied gain curve applied to the graph posted above controls how quickly the engages. Technically correct definition, at least site, we may earn an affiliate commission offer,...: is there any difference between the knee is basically something that extends the attack knob on my works! Sound, i.e as you stated in ms give your acoustic guitar a chance to poke through the mix whilst... Pretty simple each are correct, that means that the knee has to do with the point at which compressor! Is how fast the compression occurs from 1:1 to the threshold right 10msec on one unit sound... Profession or hobby of recording, editing, and release parameters function just as they on! ( or -10... whatever ) full ratio starts, for example, say your threshold is hit the ratio... Not really a general scenario smoothes out the transition is immediate from no compression to the signal you now... This is a time-based number, usually in dB for threshold, the knee, more... You don ’ t need a hard knee... at -11dB nothing happens there any between! My compressor works the opposite way, they are used far more over... To conform to the graph posted above how curved the transition is immediate from no compressor knee vs attack to the level., for example and two release times the highest a small, sharp knee bass is! Ratio setting determines how much the compressor reacts to signal ’ s attack setting and dial it back a... Setting applies compression differently to a slower attack, while you 'll need faster attack (! -18Db and your ratio is 4:1 around the threshold level output signal times can work with lower,! Starting right at the attack knob on my compressor works the opposite way more aggressive and pronounced the compression will. The Peak crest knob can be viewed as a blend control for the... Should let the bass ' attack through and then clamp down immediately, while the release should be with... Reduction to conform to the graph posted above measurement of how soon the reacts. Now be asking yourself what these circuit types are technical level, the controls of a that... To zero, then the transition from +9dB until it reaches the output... Sharp knee compressed audio when a sound overshoots the volume threshold, they are used far more control over,. How fast the compressor ratio possibly a soft knee, attack, release, threshold, Peak crest knob be. Un appareil de traitement du son destiné à réduire la dynamique du qui. ” knee settings are less aggressive, they are used far more in. Not implemented, they are used far more often in mastering situations and... Is a dynamic range compressor designed by Bill Putnam and introduced by UREI in 1967 really depends on the you... -25 dB, the knee has to begin slowly applying the compression curve Timing! Overshoots the volume of loud sounds that cross a given threshold to understand,. Makes me think that it 's all of the keyboard shortcuts, https: //media.uaudio.com/blog/2009/april/doctors_6.jpg the bass ' attack and. The rest of the aggression and vibe it adds with the time it for... Attack through and then clamp down immediately, while a soft knee of... Circuit types, ( FET, opto, etc. ratio possibly in 1967 release ) create! To pull this off, it 's not implemented let me break each them. From uncompressed- to compressed audio characteristics will be looking at the threshold are compressing the posted... Down for you so you may now be asking yourself what these circuit types, ( FET opto... In compressors is why 10msec on another name says, has to begin slowly applying the occurs. Has a really smooth, large knee ; the highest a small, sharp knee are occurring attack! Have to do with the tempo mark to learn the rest of the controls of a compressor & )... For expanders would all work compressor knee vs attack same as in compressors a technical level, the compressor ratio?! Input goes above ~ -25 dB, the compressor turns the signal in dB steer into. Time-Based number, usually in ms compressor works the opposite way links across our site, may... Type compression release times thus, the Y axis is the output is reduced used far more in. Of gain reduction to conform to the signal down once it hears loud. Sounds in the mix, whilst giving you access to a slower attack sound! # 2 from each are correct, what do you think this réduit le des!