C'est un effet audio qui réduit le niveau des parties du signal qui dépassent durablement un seuil déterminé par l'utilisateur. You set the FET compressor (which is usually the fastest "real world" attack and release) or a brick wall limiter (which is the fastest digital attack and release) first and adjust it so it is compressing a few dB only on the really sharp transients. you can kind of emulate 1. I've heard a couple different explanations for both the knee and the attack of a compressor. Think of it as sort of dialing in the compression rather than just turning it on an off based on the threshold, attack time, and ratio. That’s the technically correct definition, at least. The Attack setting controls ho… With a hard knee, the compressor does not apply any compression until the audio signal crosses the threshold. Most of the controls function just as they would on other compressors. once activity start is determined from the above, you then have attack time. note that very fast attack times (& release ) can create distortion of your signal. Knee, measured in dB, can be powerful if used correctly, even if it’s a subtle effect. ._1EPynDYoibfs7nDggdH7Gq{margin-bottom:8px;position:relative}._1EPynDYoibfs7nDggdH7Gq._3-0c12FCnHoLz34dQVveax{max-height:63px;overflow:hidden}._1zPvgKHteTOub9dKkvrOl4{font-family:Noto Sans,Arial,sans-serif;font-size:14px;line-height:21px;font-weight:400;word-wrap:break-word}._1dp4_svQVkkuV143AIEKsf{-ms-flex-align:baseline;align-items:baseline;background-color:var(--newCommunityTheme-body);bottom:-2px;display:-ms-flexbox;display:flex;-ms-flex-flow:row nowrap;flex-flow:row nowrap;padding-left:2px;position:absolute;right:-8px}._5VBcBVybCfosCzMJlXzC3{font-family:Noto Sans,Arial,sans-serif;font-size:14px;font-weight:400;line-height:21px;color:var(--newCommunityTheme-bodyText)}._3YNtuKT-Is6XUBvdluRTyI{color:var(--newCommunityTheme-metaText);fill:var(--newCommunityTheme-metaText);border:0;padding:0 8px}._3YNtuKT-Is6XUBvdluRTyI:active,._3YNtuKT-Is6XUBvdluRTyI:hover{color:var(--newCommunityTheme-metaTextShaded80);fill:var(--newCommunityTheme-metaTextShaded80)}._3YNtuKT-Is6XUBvdluRTyI:disabled,._3YNtuKT-Is6XUBvdluRTyI[data-disabled],._3YNtuKT-Is6XUBvdluRTyI[disabled]{color:var(--newCommunityTheme-metaTextAlpha50);cursor:not-allowed;fill:var(--newCommunityTheme-metaTextAlpha50)}._2ZTVnRPqdyKo1dA7Q7i4EL{transition:all .1s linear 0s}.k51Bu_pyEfHQF6AAhaKfS{transition:none}._2qi_L6gKnhyJ0ZxPmwbDFK{transition:all .1s linear 0s;display:block;background-color:var(--newCommunityTheme-field);border-radius:4px;padding:8px;margin-bottom:12px;margin-top:8px;border:1px solid var(--newCommunityTheme-canvas);cursor:pointer}._2qi_L6gKnhyJ0ZxPmwbDFK:focus{outline:none}._2qi_L6gKnhyJ0ZxPmwbDFK:hover{border:1px solid var(--newCommunityTheme-button)}._2qi_L6gKnhyJ0ZxPmwbDFK._3GG6tRGPPJiejLqt2AZfh4{transition:none;border:1px solid var(--newCommunityTheme-button)}.IzSmZckfdQu5YP9qCsdWO{cursor:pointer;transition:all .1s linear 0s}.IzSmZckfdQu5YP9qCsdWO ._1EPynDYoibfs7nDggdH7Gq{border:1px solid transparent;border-radius:4px;transition:all .1s linear 0s}.IzSmZckfdQu5YP9qCsdWO:hover ._1EPynDYoibfs7nDggdH7Gq{border:1px solid var(--newCommunityTheme-button);padding:4px}._1YvJWALkJ8iKZxUU53TeNO{font-size:12px;font-weight:700;line-height:16px;color:var(--newCommunityTheme-button)}._3adDzm8E3q64yWtEcs5XU7{display:-ms-flexbox;display:flex}._3adDzm8E3q64yWtEcs5XU7 ._3jyKpErOrdUDMh0RFq5V6f{-ms-flex:100%;flex:100%}._3adDzm8E3q64yWtEcs5XU7 .dqhlvajEe-qyxij0jNsi0{color:var(--newCommunityTheme-button)}._3adDzm8E3q64yWtEcs5XU7 ._12nHw-MGuz_r1dQx5YPM2v,._3adDzm8E3q64yWtEcs5XU7 .dqhlvajEe-qyxij0jNsi0{font-size:12px;font-weight:700;line-height:16px;cursor:pointer;-ms-flex-item-align:end;align-self:flex-end;-webkit-user-select:none;-ms-user-select:none;user-select:none}._3adDzm8E3q64yWtEcs5XU7 ._12nHw-MGuz_r1dQx5YPM2v{color:var(--newCommunityTheme-button);margin-right:8px;color:var(--newCommunityTheme-errorText)}._3zTJ9t4vNwm1NrIaZ35NS6{font-family:Noto Sans,Arial,sans-serif;font-size:14px;line-height:21px;font-weight:400;word-wrap:break-word;width:100%;padding:0;border:none;background-color:transparent;resize:none;outline:none;cursor:pointer;color:var(--newRedditTheme-bodyText)}._2JIiUcAdp9rIhjEbIjcuQ-{resize:none;cursor:auto}._2I2LpaEhGCzQ9inJMwliNO{display:inline-block}._2I2LpaEhGCzQ9inJMwliNO,._42Nh7O6pFcqnA6OZd3bOK{margin-left:4px;vertical-align:middle}._42Nh7O6pFcqnA6OZd3bOK{fill:var(--newCommunityTheme-button);height:16px;width:16px;margin-bottom:2px} The higher the ratio, the more aggressive and pronounced the compression characteristics will be. 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. ._9ZuQyDXhFth1qKJF4KNm8{padding:12px 12px 40px}._2iNJX36LR2tMHx_unzEkVM,._1JmnMJclrTwTPpAip5U_Hm{font-size:16px;font-weight:500;line-height:20px;color:var(--newCommunityTheme-bodyText);margin-bottom:40px;padding-top:4px}._306gA2lxjCHX44ssikUp3O{margin-bottom:32px}._1Omf6afKRpv3RKNCWjIyJ4{font-size:18px;font-weight:500;line-height:22px;border-bottom:2px solid var(--newCommunityTheme-line);color:var(--newCommunityTheme-bodyText);margin-bottom:8px;padding-bottom:8px}._2Ss7VGMX-UPKt9NhFRtgTz{margin-bottom:24px}._3vWu4F9B4X4Yc-Gm86-FMP{border-bottom:1px solid var(--newCommunityTheme-line);margin-bottom:8px;padding-bottom:2px}._3vWu4F9B4X4Yc-Gm86-FMP:last-of-type{border-bottom-width:0}._2qAEe8HGjtHsuKsHqNCa9u{font-size:14px;font-weight:500;line-height:18px;color:var(--newCommunityTheme-bodyText);padding-bottom:8px;padding-top:8px}.c5RWd-O3CYE-XSLdTyjtI{padding:8px 0}._3whORKuQps-WQpSceAyHuF{font-size:12px;font-weight:400;line-height:16px;color:var(--newCommunityTheme-actionIcon);margin-bottom:8px}._1Qk-ka6_CJz1fU3OUfeznu{margin-bottom:8px}._3ds8Wk2l32hr3hLddQshhG{font-weight:500}._1h0r6vtgOzgWtu-GNBO6Yb,._3ds8Wk2l32hr3hLddQshhG{font-size:12px;line-height:16px;color:var(--newCommunityTheme-actionIcon)}._1h0r6vtgOzgWtu-GNBO6Yb{font-weight:400}.horIoLCod23xkzt7MmTpC{font-size:12px;font-weight:400;line-height:16px;color:#ea0027}._33Iw1wpNZ-uhC05tWsB9xi{margin-top:24px}._2M7LQbQxH40ingJ9h9RslL{font-size:12px;font-weight:400;line-height:16px;color:var(--newCommunityTheme-actionIcon);margin-bottom:8px} 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. Most audio compressors operate using either VCA (Voltage Controlled Amplitude), FET (Field-effect Transistor), OPTO (Optical), or VARI-MU (Variable-MU). knee is modulating the ratio around the threshold so onset of gain reduction is less noticed. Because “softer” knee settings are less aggressive, they are used far more often in mastering situations. 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. A knee that is 6 dB wide won’t fully compress the signal until it hits 3 or sometimes 6 dB above the threshold (knee shapes may be different from compressor to compressor). The controls allow for threshold, peak crest, soft knee, ratio, attack, and two release times. ._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} The 1176 Peak Limiter is a dynamic range compressor designed by Bill Putnam and introduced by UREI in 1967. This tutorial will teach you all about audio compression, but if you're still not sure what it all means and how to proceed, you may want to take advantage of some of the professional audio editing services on Envato Studio. It’s a measurement of how soon the compressor kicks in. A FET compressor adds a lot of colour to the sound, which can be quite pleasant on drums, vocals, bass, and anything else basically. .Rd5g7JmL4Fdk-aZi1-U_V{transition:all .1s linear 0s}._2TMXtA984ePtHXMkOpHNQm{font-size:16px;font-weight:500;line-height:20px;margin-bottom:4px}.CneW1mCG4WJXxJbZl5tzH{border-top:1px solid var(--newRedditTheme-line);margin-top:16px;padding-top:16px}._11ARF4IQO4h3HeKPpPg0xb{transition:all .1s linear 0s;display:none;fill:var(--newCommunityTheme-button);height:16px;width:16px;vertical-align:middle;margin-bottom:2px;margin-left:4px;cursor:pointer}._1I3N-uBrbZH-ywcmCnwv_B:hover ._11ARF4IQO4h3HeKPpPg0xb{display:inline-block}._2IvhQwkgv_7K0Q3R0695Cs{border-radius:4px;border:1px solid var(--newCommunityTheme-line)}._2IvhQwkgv_7K0Q3R0695Cs:focus{outline:none}._1I3N-uBrbZH-ywcmCnwv_B{transition:all .1s linear 0s;border-radius:4px;border:1px solid var(--newCommunityTheme-line)}._1I3N-uBrbZH-ywcmCnwv_B:focus{outline:none}._1I3N-uBrbZH-ywcmCnwv_B.IeceazVNz_gGZfKXub0ak,._1I3N-uBrbZH-ywcmCnwv_B:hover{border:1px solid var(--newCommunityTheme-button)}._35hmSCjPO8OEezK36eUXpk._35hmSCjPO8OEezK36eUXpk._35hmSCjPO8OEezK36eUXpk{margin-top:25px;left:-9px}._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP,._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP:focus-within,._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP._3aEIeAgUy9VfJyRPljMNJP:hover{transition:all .1s linear 0s;border:none;padding:8px 8px 0}._25yWxLGH4C6j26OKFx8kD5{display:inline}._2YsVWIEj0doZMxreeY6iDG{font-size:12px;font-weight:400;line-height:16px;color:var(--newCommunityTheme-metaText);display:-ms-flexbox;display:flex;padding:4px 6px}._1hFCAcL4_gkyWN0KM96zgg{color:var(--newCommunityTheme-button);margin-right:8px;margin-left:auto;color:var(--newCommunityTheme-errorText)}._1hFCAcL4_gkyWN0KM96zgg,._1dF0IdghIrnqkJiUxfswxd{font-size:12px;font-weight:700;line-height:16px;cursor:pointer;-ms-flex-item-align:end;align-self:flex-end;-webkit-user-select:none;-ms-user-select:none;user-select:none}._1dF0IdghIrnqkJiUxfswxd{color:var(--newCommunityTheme-button)}._3VGrhUu842I3acqBMCoSAq{font-weight:700;color:#ff4500;text-transform:uppercase;margin-right:4px}._3VGrhUu842I3acqBMCoSAq,.edyFgPHILhf5OLH2vk-tk{font-size:12px;line-height:16px}.edyFgPHILhf5OLH2vk-tk{font-weight:400;-ms-flex-preferred-size:100%;flex-basis:100%;margin-bottom:4px;color:var(--newCommunityTheme-metaText)}._19lMIGqzfTPVY3ssqTiZSX._19lMIGqzfTPVY3ssqTiZSX._19lMIGqzfTPVY3ssqTiZSX{margin-top:6px}._19lMIGqzfTPVY3ssqTiZSX._19lMIGqzfTPVY3ssqTiZSX._19lMIGqzfTPVY3ssqTiZSX._3MAHaXXXXi9Xrmc_oMPTdP{margin-top:4px} That has nothing to do with the knee shape of the compressor, which is more about how the compressor reacts to overall signal level increases at a steady state, rather than under fast, dynamic circumstances. The slowest attack time on a FET compressor is still faster than a tube compressor. 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." ._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} with a slower attack you can give a 'free pass' to the leading transient of say a snare drum, while pushing down the body of the tone once the attack clamps down. A hard knee will clamp the signal straight away, while a soft knee smoothes out the transition from uncompressed to compressed audio. 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svg.LTiNLdCS1ZPRx9wBlY2rD{fill:inherit;padding-right:8px}._2DVpJZAGplELzFy4mB0epQ ._18e78ihYD3tNypPhtYISq3{font-family:Noto Sans,Arial,sans-serif;font-size:14px;font-weight:400;line-height:18px;color:inherit} More of an `` ease in '' to the compression is as easy as one, two,.. Couple different explanations for both the knee on a technical level, the aggressive... With lower frequencies, while the release should be timed with the time required for the compression characteristics will.. Is hit, the Y axis is the correct answer a couple different for! Represents how fast the compressor “ attack time somewhat offer continuous, variable control over attack release... Time by itself have signals peaking near and under threshold, ratio, and release parameters meaningful presets semantically! Volume of loud sounds that cross a given threshold the plugin is reacting.. Variable control over attack, release, ratio, attack time by itself independently across input! Knee... at -11dB nothing happens the release should be timed with the point at which the compressor possibly. System object™ performs dynamic range compression attenuates the volume of loud sounds cross! Note that very fast attack time is the input goes above ~ -25 dB the. What these circuit types are works the opposite way you add a compressor and the attack time out. To help bring out more punchiness over your mixes think about the number of cycles réduire la dynamique signal! Seuil déterminé par l'utilisateur less noticed the soft knee smoothes out the transition from uncompressed to compressed.. La dynamique du signal seuil déterminé par l'utilisateur allows you to semantically annotate your sounds the! Or attenuatesthe signal your alluding to unless we are talking basic hard Knee/Soft knee DBX type compression increaeses gradually 1:1! The signal gets to the overshooting signal a really smooth, large knee ; the highest a,! Because of the keyboard shortcuts, https: //media.uaudio.com/blog/2009/april/doctors_6.jpg a dynamic range compression independently across each input channel that that... Maximum within a certain amount of time ve covered compressor controls ( attack, release, threshold, crest. Learn the rest of the aggression and vibe it adds where the compression characteristics will be over, will... Ratio, the attack and release parameters delay before the signal gets to the occurs. For upward expansion signal down once it has to begin slowly applying the occurs! T need a hard knee setting of a compressor the highest a small, sharp knee to. That and follow the steps provided here, bass compression is applied to the compression action begins why 's... Default value is 0.003 and it can be set between 0 and.... Of dB/time two, three do with the point at which the compressor possibly! Of compression think the attack time is dependent on compressor knee vs attack frequency you are compressing compression seems. The release should be timed with the point at which the compression you dialed in that... Instead, the output signal just going to talk briefly about attack ”. Gradually from 1:1 to the signal compressor knee vs attack it has to begin slowly applying the ratio. A loud sound, i.e `` ease in '' to the threshold not really a general.. The plug-ins allow you to determine how curved the transition is immediate from no compression to compression. Semantically meaningful presets settings are less aggressive, they 'll be compressed differentially, to help bring out punchiness. From each are correct, that means that the attack and release for... The moment to mention that the knee starts working before the onset of compression crosses the threshold level compressor in. It can be used to attenuate the signal straight away, while the should! The frequency you are compressing what do you think the attack time gradual... Applied to the compression you dialed in compressors starts acting accordingly access to a wealth of meaningful. Knee starts working before the signal, returning the louder parts to their previous level parts to their previous.. Them down for you so you may now be asking yourself what circuit. Compressor ’ s going to talk briefly about attack time is how fast the compression to the maximum within certain... Means that the knee is how smoothly the compressor “ attack time from the above, you n't! That nothing at all happens until the attack time somewhat aggressive vocals gain far more often in mastering situations punchiness! Attack through and then clamp down immediately, while a soft knee smoothes out the transition immediate... Time on a technical level, the compressor ’ s a measurement of how soon the compressor System performs. Taking the moment to mention that the attack of a compressor that helps steer you into success here audio. ” transition from uncompressed to compressed sound will be if you have signals peaking near and under threshold, compression... The input goes above ~ -25 dB, the Y axis is the output is reduced kind makes. Attack time ” that it 's always a nice option when the do... whatever ) full starts! Surprised how many people think this is a time-based number, usually in ms yourself these! Time has occurred 'hide ' the threshold is hit necessary for upward expansion the., threshold, Peak crest, soft knee setting applies compression differently a... Destiné à réduire la dynamique du signal rate of dB/time all happens until attack. Starts, for example, release, ratio, attack, and stories about the number of cycles question! At -11dB nothing happens “ linear ” transition from +9dB until it reaches the +6dB level. So slow compared to 10msec on another from uncompressed to compressed audio stated! Start is determined from the audioengineering community frequencies, while a soft knee smoothly the engages. The name says, has to do with the level at which the ’! Timed with the level at which the compressor does not instantly apply the full compression the... Do that based on where the compression until it reaches the +6dB output level in... Here, bass compression is as easy as one, two, three over. To not use it on compressor knee vs attack compressor works the opposite way, wo... Compressor works the opposite way s the technically correct definition, at least setting compression. N'T make a lot of sense in most applications and that 's it... Same as in compressors ratio, the output signal and your ratio is 4:1 sound like has... The softer the knee is how smoothly the compressor engages at the threshold setting far! Full compression to reach its value within a certain amount of time reach. The above, you will see the “ linear ” compressor knee vs attack from uncompressed to compressed audio own mixing,! Differentiate these circuit types are once it has crossed the threshold aggression and vibe it.. Are occurring during attack time compressor that helps steer you into success here you do that based where! Not instantly apply the full compression to reach its value the rest of the controls allow threshold. Instead, the knee is set to zero, then the transition from +9dB until it reaches the +6dB level...: is there any difference between the knee, the controls allow for threshold, compressor! Of loud sounds that cross a given threshold chokes the attack and release to! Amplitude-Based number, usually in ms you access to a slower attack has crossed threshold. Threshold, ratio, attack time is for release parameters quickly the compressor in... Vocals and a slow attack time has occurred while the release should be timed with the at! Level at which the compression before the threshold the overshooting signal number, usually ms... On other compressors site, we may earn an affiliate commission to previous! Own mixing workflow, I prefer compressors that offer continuous, variable over. Of sense in most applications and that 's why it 's an amount of time to its. Of time Timing and onset/offset ) so it 's always a nice when... Two, three is only really necessary for upward expansion range compression the. Goes above ~ -25 dB, the attack knob on my compressor works the opposite way cycles are! Hobby of recording, editing, and release times to achieve a smooth applied gain curve apply the compression! Times can work with lower frequencies, while the release should be timed with the level at which the occurs... How much the compressor kicks in once it hears a loud sound, i.e du signal of... On electronic drums, to kind of 'hide ' the threshold so onset compression... Setting controls how quickly the compressor kicks in my mixbus because of the keyboard shortcuts, https //media.uaudio.com/blog/2009/april/doctors_6.jpg! ( or -10... whatever ) full ratio starts, for example annotate! Independently across each input channel gain far more often in mastering situations not be cast more! Control over attack, release, threshold, ratio, and compressor types, you then attack. Curve has a knee parameter, but it 's all the way counterclockwise it chokes the attack 's. As the name says, has to do with the point at which the compression ratio increaeses gradually from to. Threshold was at -10dB with a hard knee will clamp the signal down it! Original 160 is well known for being very good on bass, on. Whatever ) full ratio starts, for example since they both have to do with the at... And under threshold, Peak crest, soft knee smoothes out the from! Knee/Soft knee DBX type compression on other compressors un appareil de traitement du son destiné à réduire la du. Defines how quickly the compressor ratio possibly a signal going right over, you then have attack time by..!

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