If you want a slower transition, where the … But as soon as that signal crosses the threshold the compressors starts acting accordingly. "Programme Dependent Compression" seems to be what your alluding to unless we are talking basic Hard Knee/Soft Knee DBX type compression. So, the knee has to do with the level at which the compression occurs. /*# 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} Many engineers use the 1176 for parallel processing because of the aggression and vibe it adds. In other situations I think that it's an amount of time to reach an xdB reduction....so like a rate of dB/time. ._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} The knee sits at or around the threshold point…and represents how much and at what amplitude level the compressor will…attenuate the signal.…Some compressors allow us to change this knee from what is known as hard knee, or…the full ratio of compression, as soon as the signal passes the threshold to what…is known as soft knee, a more gradual form of compression where the signal is…eased into the compressor's … Lower the threshold to apply more compression and vice versa. Thanks! ), and compressor types, (FET, opto, etc.) with a hard knee, you get the activity starting right at the threshold level. 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. 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." Most of the controls function just as they would on other compressors. 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. So you may now be asking yourself what these circuit types are. ._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} 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. Now elsewhere on this blog we’ve covered compressor controls (attack, release, threshold, ratio, knee, etc. 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. so slower attack times can work with lower frequencies, while you'll need faster attack times to handle higher frequencies. ._3gbb_EMFXxTYrxDZ2kusIp{margin-bottom:24px;text-transform:uppercase;width:100%}._3gbb_EMFXxTYrxDZ2kusIp:last-child{margin-bottom:10px} Attack time (when used in the traditional sense, ie a time constant) is the time it takes for the compressor to engage 66%. I think its worthwhile taking the moment to mention that the attack time isn't a delay before the onset of compression. This is a time-based number, usually in ms. It allows you to determine how curved the transition from uncompressed- to compressed sound will be. This is confusing. Semantic Audio Plug-ins are cross-platform DAW audio effects. This sounds more natural and musical. When you buy products through links across our site, we may earn an affiliate commission. G. guitarman3001 Member. 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. It kind of makes me think that the knee is basically something that extends the attack time somewhat. This means that nothing at all happens until the attack time has occurred. 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. ._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} ._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} However, I do tend to not use it on my mixbus because of its colouring. 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. Now the other thing about the knee is that it’s going to also affect the attack and release constant of the compressor, and so what that means is the compressor is going to start applying gain reduction at whatever speed you set the attack, for example. .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)} 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. with lower frequencies its fewer and with higher frequencies is far greater number of cycles. You will be surprised how many people think this. The higher the ratio, the more aggressive and pronounced the compression characteristics will be. 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. Let's say you set a knee with a value of 10dB (which is considered soft), and your ratio is set to 4:1. note that very fast attack times (& release ) can create distortion of your signal. The Threshold setting determines when the compressor actually begins compressing. ._12xlue8dQ1odPw1J81FIGQ{display:inline-block;vertical-align:middle} 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. Messages 10,970. That’s the technically correct definition, at least. 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. Say your threshold is -18dB and your ratio is 4:1. .s5ap8yh1b4ZfwxvHizW3f{color:var(--newCommunityTheme-metaText);padding-top:5px}.s5ap8yh1b4ZfwxvHizW3f._19JhaP1slDQqu2XgT3vVS0{color:#ea0027} Makeup gain is only really necessary for upward expansion. It’s a measurement of how soon the compressor kicks in. AUDIO Compressor / Video Preview to understand this, think about the number of cycles that are occurring during attack time. ._1zyZUfB30L-DDI98CCLJlQ{border:1px solid transparent;display:block;padding:0 16px;width:100%;border:1px solid var(--newCommunityTheme-body);border-radius:4px;box-sizing:border-box}._1zyZUfB30L-DDI98CCLJlQ:hover{background-color:var(--newCommunityTheme-primaryButtonTintedEighty)}._1zyZUfB30L-DDI98CCLJlQ._2FebEA49ReODemDlwzYHSR,._1zyZUfB30L-DDI98CCLJlQ:active,._1zyZUfB30L-DDI98CCLJlQ:hover{color:var(--newCommunityTheme-bodyText);fill:var(--newCommunityTheme-bodyText)}._1zyZUfB30L-DDI98CCLJlQ._2FebEA49ReODemDlwzYHSR,._1zyZUfB30L-DDI98CCLJlQ:active{background-color:var(--newCommunityTheme-primaryButtonShadedEighty)}._1zyZUfB30L-DDI98CCLJlQ:disabled,._1zyZUfB30L-DDI98CCLJlQ[data-disabled],._1zyZUfB30L-DDI98CCLJlQ[disabled]{background-color:var(--newCommunityTheme-primaryButtonTintedFifty);color:rgba(var(--newCommunityTheme-bodyText),.5);fill:rgba(var(--newCommunityTheme-bodyText),.5);cursor:not-allowed}._1zyZUfB30L-DDI98CCLJlQ:active,._1zyZUfB30L-DDI98CCLJlQ:disabled,._1zyZUfB30L-DDI98CCLJlQ:hover,._1zyZUfB30L-DDI98CCLJlQ[data-disabled],._1zyZUfB30L-DDI98CCLJlQ[disabled]{border:1px solid var(--newCommunityTheme-body)}._1O2i-ToERP3a0i4GSL0QwU,._1uBzAtenMgErKev3G7oXru{display:block;fill:var(--newCommunityTheme-body);height:22px;width:22px}._1O2i-ToERP3a0i4GSL0QwU._2ilDLNSvkCHD3Cs9duy9Q_,._1uBzAtenMgErKev3G7oXru._2ilDLNSvkCHD3Cs9duy9Q_{height:14px;width:14px}._2kBlhw4LJXNnk73IJcwWsT,._1kRJoT0CagEmHsFjl2VT4R{height:24px;padding:0;width:24px}._2kBlhw4LJXNnk73IJcwWsT._2ilDLNSvkCHD3Cs9duy9Q_,._1kRJoT0CagEmHsFjl2VT4R._2ilDLNSvkCHD3Cs9duy9Q_{height:14px;width:14px}._3VgTjAJVNNV7jzlnwY-OFY{font-size:14px;line-height:32px;padding:0 16px}._3VgTjAJVNNV7jzlnwY-OFY,._3VgTjAJVNNV7jzlnwY-OFY._2ilDLNSvkCHD3Cs9duy9Q_{font-weight:700;letter-spacing:.5px;text-transform:uppercase}._3VgTjAJVNNV7jzlnwY-OFY._2ilDLNSvkCHD3Cs9duy9Q_{font-size:12px;line-height:24px;padding:4px 9px 2px;width:100%}._2QmHYFeMADTpuXJtd36LQs{font-size:14px;line-height:32px;padding:0 16px}._2QmHYFeMADTpuXJtd36LQs,._2QmHYFeMADTpuXJtd36LQs._2ilDLNSvkCHD3Cs9duy9Q_{font-weight:700;letter-spacing:.5px;text-transform:uppercase}._2QmHYFeMADTpuXJtd36LQs._2ilDLNSvkCHD3Cs9duy9Q_{font-size:12px;line-height:24px;padding:4px 9px 2px;width:100%}._2QmHYFeMADTpuXJtd36LQs:hover ._31L3r0EWsU0weoMZvEJcUA{display:none}._2QmHYFeMADTpuXJtd36LQs ._31L3r0EWsU0weoMZvEJcUA,._2QmHYFeMADTpuXJtd36LQs:hover ._11Zy7Yp4S1ZArNqhUQ0jZW{display:block}._2QmHYFeMADTpuXJtd36LQs ._11Zy7Yp4S1ZArNqhUQ0jZW{display:none}._2CLbCoThTVSANDpeJGlI6a{width:100%}._2CLbCoThTVSANDpeJGlI6a:hover ._31L3r0EWsU0weoMZvEJcUA{display:none}._2CLbCoThTVSANDpeJGlI6a ._31L3r0EWsU0weoMZvEJcUA,._2CLbCoThTVSANDpeJGlI6a:hover ._11Zy7Yp4S1ZArNqhUQ0jZW{display:block}._2CLbCoThTVSANDpeJGlI6a ._11Zy7Yp4S1ZArNqhUQ0jZW{display:none} 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. this would be a 'soft knee'. It really depends on the unit, which is why 10msec on one unit can sound so slow compared to 10msec on another. 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. The attack property's default value is 0.003 and it can be set between 0 and 1. The attack time, as the name says, has to do with the time required for the compression to reach its value. 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). you can kind of emulate 1. Jul 1, 2013 #11 Holy Schnikes said: I have the EQD Warden optical compressor… A knee that is 6 dB wide won’t fully compress the signal until it hits 3 or … http://www.uaudio.com/media/assetlib...6ln_manual.pdf. ._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} C'est un effet audio qui réduit le niveau des parties du signal qui dépassent durablement un seuil déterminé par l'utilisateur. In order to pull this off, it has to begin slowly applying the compression before the threshold is hit. In normal compression, the knee (which is the point where compression begins) is an abrupt angle whereas in the soft knee it is more of a curve. How to Get Light Tonal Compression. See this picture: https://media.uaudio.com/blog/2009/april/doctors_6.jpg. 1) by delaying the sidechain. Attack is how fast the compressor reacts to signal. Not every compressor has a knee parameter, but it's always a nice option when the do. As long as the input level is +9dB, the output level is +6dB (one way to think of a “compressor” is an automatic volume regulator). Knee, attack time, and release time for expanders would all work the same as in compressors. 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. The plug-ins allow you to semantically annotate your sounds in the mix, whilst giving you access to a wealth of semantically meaningful presets. This can give your acoustic guitar a chance to poke through the mix and sound like it has a lot of life. Mastering Compressor has two knee controls: Knee1 softens the default hard-knee operation so that the compression amount is applied along a gentle curve as the signal approaches the threshold. The softer the knee, the more gradual the effect. It’s a measurement of how soon the compressor kicks in. The Peak Crest knob can be viewed as a blend control for what the plugin is reacting to. By learning to differentiate these circuit types, you will gain far more control over your mixes. .FIYolDqalszTnjjNfThfT{max-width:256px;white-space:normal;text-align:center} Attack & Release. It’s going to do that based on where the compression action begins. To add to this, the attack time is the time it takes for the gain reduction to conform to the graph posted above. Because “softer” knee settings are less aggressive, they are used far more often in mastering situations. The knee is the sharpness of the angle. A soft knee setting applies compression differently to a hard knee setting. On a technical level, the controls of a compressor are pretty simple. It works by ‘blurring’ the threshold. knee is modulating the ratio around the threshold so onset of gain reduction is less noticed. Today we will be looking at the attack and release parameters. Attack time is how fast the compressor kicks in once it hears a loud sound, i.e. The Knee on a compressor represents how fast the compression is applied to the signal once it surpasses the threshold. Some compressors have something known as a knee control; it allows you to set a dB range around the threshold in which the ratio you've set is gradually applied. More so a case by case scenario. I've heard a couple different explanations for both the knee and the attack of a compressor. That's hard to say in all cases. Quick question: Is there any difference between the knee setting of a compressor and the attack time? but today we’re just going to talk briefly about attack time by itself.. Most audio compressors operate using either VCA (Voltage Controlled Amplitude), FET (Field-effect Transistor), OPTO (Optical), or VARI-MU (Variable-MU). 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? /*# 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} .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} 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). If #2 from each are correct, that means that the knee starts working BEFORE the signal gets to the threshold right? For example, say your threshold was at -10dB with a hard knee...at -11dB nothing happens. The compressor section comprises four more large rotary switches and a single illuminated (yellow, again) push button to engage the compressor section. A soft knee setting will apply the compression gradually until the full ratio is … Instead, the compression ratio increaeses gradually from 1:1 to the maximum within a certain amount of time. If you think this is correct, what do you think the attack time is for? A FET compressor adds a lot of colour to the sound, which can be quite pleasant on drums, vocals, bass, and anything else basically. Use a fast attack time for thick, heavy vocals and a slow attack time for punchy, aggressive vocals. I think on some units it can be as you stated. When a sound overshoots the volume threshold, the compressor does not instantly apply the full compression to the overshooting signal. The compressor’s attack setting controls how quickly the compressor turns the signal down once it has crossed the threshold. From idealized diagrams of soft knee it's like #2. Dynamic range compression attenuates the volume of loud sounds that cross a given threshold. With a hard knee, the compressor does not apply any compression until the audio signal crosses the threshold. if you have a signal going right over, you won't hear the soft knee. The original 160 is well known for being very good on bass, and on electronic drums, to help bring out more punchiness. Description. attack is NOT linear and is logarithmic in nature and there is a difference between FET / OPTO / VCA in their behavior with respect to attack & release curves. New comments cannot be posted and votes cannot be cast, More posts from the audioengineering community. 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. This is a time-based number, usually in ms. The 1176 Peak Limiter is a dynamic range compressor designed by Bill Putnam and introduced by UREI in 1967. As I rotate it clockwise, it opens it up more and lets more of the picking attack come through before the compression kicks in. Knee, measured in dB, can be powerful if used correctly, even if it’s a subtle effect. 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. I also recommend using a soft knee compressor for this approach if possible (just turn up the knee parameter if your compressor has one). 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 slowest attack time on a FET compressor is still faster than a tube compressor. ._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} Products, practices, and stories about the profession or hobby of recording, editing, and producing audio. Press question mark to learn the rest of the keyboard shortcuts, https://media.uaudio.com/blog/2009/april/doctors_6.jpg. Then you can take advantage of your compressor’s attack setting and dial it back to a slower attack. 2) and 2) is the correct answer. The attack should let the bass' attack through and then clamp down immediately, while the release should be timed with the tempo. ._3Qx5bBCG_O8wVZee9J-KyJ{border-top:1px solid var(--newRedditTheme-line);margin-top:16px;padding-top:16px}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN{margin:0;padding:0}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN ._2btz68cXFBI3RWcfSNwbmJ{font-family:Noto Sans,Arial,sans-serif;font-size:14px;font-weight:400;line-height:21px;display:-ms-flexbox;display:flex;-ms-flex-pack:justify;justify-content:space-between;margin:8px 0}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN ._2btz68cXFBI3RWcfSNwbmJ.QgBK4ECuqpeR2umRjYcP2{opacity:.4}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN ._2btz68cXFBI3RWcfSNwbmJ label{font-size:12px;font-weight:500;line-height:16px;display:-ms-flexbox;display:flex;-ms-flex-align:center;align-items:center}._3Qx5bBCG_O8wVZee9J-KyJ ._2NbKFI9n3wPM76pgfAPEsN ._2btz68cXFBI3RWcfSNwbmJ label svg{fill:currentColor;height:20px;margin-right:4px;width:20px}._3Qx5bBCG_O8wVZee9J-KyJ ._4OtOUaGIjjp2cNJMUxme_{-ms-flex-align:center;align-items:center;display:-ms-flexbox;display:flex;-ms-flex-pack:justify;justify-content:space-between;padding:0;width:100%}._3Qx5bBCG_O8wVZee9J-KyJ ._4OtOUaGIjjp2cNJMUxme_ svg{display:inline-block;height:12px;width:12px}.isInButtons2020 ._4OtOUaGIjjp2cNJMUxme_{padding:0 12px}.isInButtons2020 ._1ra1vBLrjtHjhYDZ_gOy8F{font-family:Noto Sans,Arial,sans-serif;font-size:12px;font-weight:700;letter-spacing:unset;line-height:16px;text-transform:unset}._1ra1vBLrjtHjhYDZ_gOy8F{--textColor:var(--newCommunityTheme-widgetColors-sidebarWidgetTextColor);--textColorHover:var(--newCommunityTheme-widgetColors-sidebarWidgetTextColorShaded80);font-size:10px;font-weight:700;letter-spacing:.5px;line-height:12px;text-transform:uppercase;color:var(--textColor);fill:var(--textColor);opacity:1}._1ra1vBLrjtHjhYDZ_gOy8F._2UlgIO1LIFVpT30ItAtPfb{--textColor:var(--newRedditTheme-widgetColors-sidebarWidgetTextColor);--textColorHover:var(--newRedditTheme-widgetColors-sidebarWidgetTextColorShaded80)}._1ra1vBLrjtHjhYDZ_gOy8F:active,._1ra1vBLrjtHjhYDZ_gOy8F:hover{color:var(--textColorHover);fill:var(--textColorHover)}._1ra1vBLrjtHjhYDZ_gOy8F:disabled,._1ra1vBLrjtHjhYDZ_gOy8F[data-disabled],._1ra1vBLrjtHjhYDZ_gOy8F[disabled]{opacity:.5;cursor:not-allowed} Attack time (when used in the traditional sense, ie a time constant) is the time it takes for the compressor to engage 66%. 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