RMS based compression that will act slowly to smooth out … FET – Uses Field Effect Transistors. If you use logic you can mess around with stereo, 2x mono, optical, fet, vca model compressors. A transistor is a semiconductor that can both amplify and attenuate signal based on the settings you dial in. They respond quickly to the signal you run through them, and they’re also quite punchy, colorful, and bright. This in addition to the attack and release times is probably the main contribution to the peculiar sound of the model. So you may now be asking yourself what these circuit types are. Not to be used if you’re wanting to keep things transparent. What happens to the compression curve is that after you cross the threshold it start to get more drastic as the signal increases, this also affect the knee, in fact using higher ratios result in a harder knee. FET Compressors. When you turn on the analog emulation you actually engage a waveshaper that simulates the saturation of a AB class amplifier (the one found in operational amplifiers) and DC blocking stage. Required fields are marked *. The FET model is build after a very famous boutique compressor of the latest 60′ it’s completely different from the VCA one because it’s not linear at all and it’s a feed-back compressor. Indeed, there's confusion throughout the interwebs as to the distinction, with some saying FET is a subset classification of VCA. Mixing, mastering and music production plugins, some of the best VST audio plugins, audio unit and AAX, ©2015-2020 HoRNet SRL - vat id: IT01505480523. VCA – V is for versatile… jokes, it’s not. FET compressors emulate the tube/valve sound using transistor circuits. VCA-type compressors (Voltage Controlled Amplifier-based) in my experience, can be tuned to sound like optos, fets, etc. VCA– Fast, peak based compression that offers you snap and punch. in their use. In comparison with an OPTO or VARI-MU, a FET compressor offers (just like a VCA) a very quick transient response, and are solid state by design. 4 Types Of Audio Compressors: Explained. VCA Compressor. Many people think it's tube-based, but it's all Class A/B discrete solid state with hand built circuitry of the highest grade. Optos...hmmmmm- butter knives with shotguns on the handle? That being said, FET-based … Because VCAs don’t add colour to a sound they can be used for transparent compression as they sound clean and smooth. El FET es efectivamente más rápido que el óptico, en cuanto al FET vs VCA, están en el mismo orden, ya que un VCA internamente está hecho a partir de transistores bipolares. Also, great for parallel compression. Whether it is recording, mixing or mastering, VCA compressor gets the job done in every area of audio production. However, VCAs can sound aggressive if pushed. FETs are often used as a solid-state emulation of tubes, but the main reason a comp will be advertised as FET-based is so you'll associate it with the famous and coveted UREI 1176. What are the differences between the compression models found in the ChannelStrip MK2, MultiComp and TrackShaper? The transformer stage can be utilised like a pre-ampwithout the compressor (in hardware) and it’s a great tool in the classic big rock sound. By learning to differentiate these circuit types, you will gain far more control over your mixes. In a feed-back compressor the sidechain is derived *AFTER* the gain reduction stage so it’s very program dependent, this signal is then fed to a model of a FET transistor acting in its linear region. I hope this article explains a little more what’s going on behind the scenes of the compression models, if you have more question just add a comment and I will answer! FET – Aggressive, warm, and punchy. As you may know the ChannelStrip MK2, MultiComp and TrackShaper are all built around the same compression technology, three different models: VCA, FET and OPTO. FET compressors, or field effect transistor compressors, make use of transistor circuits. Each model has different compression characteristic and is inspired by the inner workings of some famous compressor, and even the analog emulation is different from model to model. 3. Pero la compresión por VCA posee otra filosofía a la compresión por FETs, y cada uno de ellos posee sus pros y sus contras Each has different characteristics due to the way their gain reduction circuits react to the signal being passed through them. Most common VCAs used are the SSL G Bus and the DBX 160. It’s quite easy to calculate the perfect RMS of a signal in the digital domain, but here we must emulate what’s done in the analog world so the calculation is not precise, and this is what gives the compressor “a sound”. Save my name, email, and website in this browser for the next time I comment. The OPTO model is inspired by a classic vintage compressor that is build around a electroluminescent panel. OPTO– Musical and colourful. There’s some debate online about the distinction between VCA compressors and FET compressors, according to Messitte. Audio Compressors? This is pretty simple stuff, the trick is that since it’s a feed-forward compressor if it acted on peaks it would pump really too much so the sidechain driving the VCA is derived by an RMS calculator. But versatile describes this type of compressor perfectly. Hey there! When you buy products through links across our site, we may earn an affiliate commission. So it's mostly about the marketing, but you can expect more "color" in a FET effect than from a clean VCA. However, there is a fundamental difference in the transistors: In a VCA compressor, the transistor is housed within an integrated circuit (an IC) which responds to the voltage of your incoming signal. Your email address will not be published. I find it funny that no one else has answered this at all... a simpler answer (because the last was long winded and made it sound like the VCA was just better)-. Circuit Types? But know this: The designation between FET and VCA matters, because of the one of the most famous, widely used compressors of all time is an FET compressor—the previously mentioned UREI 1176. When you turn on the analog emulation you actually engage a waveshaper that simulates the saturation of a A class amplifier and DC blocking stage. This gives a sort of two staged envelope detection to the sidechain signal, adding it to the frequency dependence of the gain reduction module you obtain a very pumping compressor. This model is inspired by the one found in some large console of the 80s, at it’s core there is a linear Voltage Controlled Amplifier (VCA) in fact when the sidechain signal crosses the set threshold, compression start to act linearly with a hard knee. FET, VCA, Optical, and Variable-Mu are 4 classifications of audio compressors. Think drums and percussion. Das hat oft etwas damit zu tun, wie schnell sich der Kompressor nach der Kompression erholt. But certain types excel in certain applications, and understanding their function and design can be the key to choosing the right compressor for the job. FET, VCA, Optical, and Variable-Mu are 4 classifications of audio compressors. The name FET suggests that these compressors use some sort of transistor. In a feed-back compressor the sidechain is derived *AFTER* the gain reduction stage so it’s very program … In my experience, FET compressors (F.E.T. FET stands for Field Effect Transistor, and they are essentially a subset of VCAs, with their own particular qualities. This is complicated, confusion stuff, to be sure. FET compressors like the 1176 are capable of exceedingly fast attack times, though not without color. That can be clean or dirty. A fantastic tool for dealing with transients. 4 Types Of Audio Compressors: Explained. This in addition to the attack and release times is probably the main contribution to the peculiar sound of the model. FETs will have more coloration than VCAs, although the older VCAs can add color because the technology back then had not yet advanced where they were as transparent as today's VCAs. Each has different characteristics due to the way their gain reduction circuits react to the signal being passed through them. Es gibt . 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