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Compressors are one of the most common studio tools for recording and mixing. It's well-known that different types of compressors work better for certain tasks. But with so many different models to choose from, it can be hard to tell which specific compressor, or even which type of compressor, is right for the job.
In this blog, we're breaking down one of the most common types of compressors: the VCA. Let's start with the basics.
Ever wonder how a VCA compressor works? Just like other types of audio compressors, a VCA compressor is used to adjust the dynamic range of an audio signal.
VCA stands for "Voltage Controlled Amplifier." The funny thing is that it's not usually an amplifier, but an attenuator, meaning that it turns the signal down when it's fed a certain control voltage.
In simple terms, a VCA compressor uses a control signal to tell the VCA circuit in the compressor when and how to attenuate the signal.
More specifically, front panel controls like Threshold, Ratio, and Attack and Release times are used to control the attenuation: when to start turning the signal down, how fast to do it, how much to do it, and how long it should take for the signal volume to return to normal.
This type of design is usually favored for mix bus applications since it allows for a lot of control, a wide range of different response times, and can be made to react very quickly if desired.
This gives you all the power you need to create cohesion and punch in your mixes, regardless of the type of song, the tempo, or how loud the drums may be. If you are going to have one single mix bus compressor that needs to cover a lot of different ground, then a stereo VCA compressor is a smart choice.
We talked with long-time engineer and Vintage King’s President & CEO Ryan McGuire about some of his favorite VCA compressors and what makes them so special in the studio setting.
At a reasonable price point, this is one of the most highly regarded VCA compressors on the market. Designed and built by audio genius Jeff Turzo, a man responsible for countless high-end custom gear-building projects for top producers. Now you can have one of his "secret weapon" designs at an accessible price point, but with no sacrifice in audio quality.
A masterpiece of VCA-based audio artwork. Hand-made in Germany with a complete "cut-no-corners" philosophy, this is as good as it gets in terms of transparency, detail, refinement, and musicality. A proprietary discrete VCA module powers this gentle giant. No audio is in danger of obliteration in the presence of this machine; it only makes everything sound better.
The classic English-style VCA bus compressor that you have heard on hundreds of hit records. Inspired by the Oxford, England originators of this compressor style, it brings its own set of tricks to the party with its super punchy and crazy "Crush" feature and more adjustability than the originals.
500 Series saves space, and in this case, money! Get the classic Smart style VCA compression with a few more features, even, but in the 500 series format to save space and weight if you are on the go.
The G-Comp packs SSL’s classic bus compressor design into a convenient 500 Series module chassis. For more than 35 years, this has been the quintessential mix bus compressor, heard on countless records.
The 500 Series version actually gives you more to work with than the original, adding three extra ratio settings for finer control, plus a sidechain high-pass filter to keep low-end heavy tracks from pumping all over the place.
The BUS+ is a souped-up stereo version of the classic SSL bus comp with enhanced features and new functionality. With four modes of operation, expanded Attack and Release options, and three different color settings, it can go from super clean and punchy to gritty and aggressive in seconds.
Another classic compressor design from SSL, this one is pulled straight from the brand’s legendary E-Series console channel strip. Packing a compressor/limiter and expander/gate into a convenient 500 Series format, it brings that punchy, aggressive SSL channel sound to your rack without taking up much space. It works especially well on individual tracks like drums, bass, and vocals, and pairs perfectly with the brand’s iconic bus compressor design.
The Tegeler Creme RC offers great bang for your buck, combining a classic VCA bus compressor with a passive Pultec-style EQ. Ideal for mixing or mastering, Creme RC is remote-controlled for quick and easy recall.
A next-generation version of the quintessential VCA bus compressor, the ngBusComp combines an all-analog signal path with full digital recall. With mono, stereo, and mid-side modes, plus a Mix knob for parallel compression, this is one of the most versatile VCA compressors on the market.
Want instant rock 'n' roll? This is as close to rock 'n' roll in a box as your stereo mix will ever see. Tight, punchy, warm, and in your face. The API sound never fails to excite, and this is no exception. Try the "thrust" circuit on your drum mix and thank us later.
A simplified and more accessible version of the Mastering Compressor's VCA section. Saves space in the 500 series and gets you a taste of what the big boy can do without having to sell your car!
The final boss of VCA compressors. This beast is two compressors in one! A stereo optical compressor followed by a discrete stereo VCA compressor, so that you can truly tackle any task, from recording any source to making your mix bus snap with this single machine.
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. Use the three switchable output transformer options to adjust the unit's color from clean (Nickel) to Neve-like (Iron), to API-Like (Steel). The ultimate desert island compressor, as there is nothing it cannot do well.
Classic Oxford, England-style VCA compressor, but with a decidedly more organic sound to it. The secret weapon of a handful of rock mixers we know, it gives you air, punch, and presence, but has a little more chilled-out and natural sonic character than the originals. A very charismatic combination.
There is no sonic difference between the 19" rack version and this 500 series version! Literally none. You don't hear that said often, do you?
Not only a mastering engineer's dream, but it's amazing on the mix bus when transparency is important. You can lay into this machine super heavy, and it doesn't give much up, just a smooth, buttery dynamic envelope with minimal artifacts and coloration.
Want to learn more about VCA compressors and how they work? Check out our blog to hear samples of classic compressors, and learn about the best compressors for vocals and drums, plus tips and tricks like how to use parallel compression!
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