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Drawmer MX PRO-50 Vocal De-Esser  From Drawmer

Vocal De-Esser (Compressor)

Drawmer

Manufacturer's Description from Drawmer

The human voice is one of the most diverse signals ever encountered by engineers because it contains such large variations in level and harmonic structure. Getting the desired vocal sound can sometimes prove difficult. Setting the E.Q. to give the vocal sufficient 'definition' and 'cut' in the mix can cause large sibilant peaks which often lead to severe distortion. The MX50 'Vocal' De-Esser solves these problems quickly and efficiently by reducing the level of the sibilant sounds whilst leaving the remainder of the signal unchanged. The MX50 is a flexible, simple to set up dual De-Esser designed to fulfil the needs of the Recording Studio, Broadcast, Theatre and Live Sound Industries. Its classic application is to overcome the problems that can arise when sibilant sounds (S's and T's) are over-emphasised by the human voice, with such other applications as 'smoothing' a stereo mix, reducing string noise on acoustic guitars or breath noise on flutes, even refining cymbal and hi-hat sounds. Processing is achieved by adjusting just two control parameters, Frequency and De-Ess. The fully variable Frequency control operates from 800Hz to 8KHz encompassing the full sibilant range, including 'hard' sounding harmonics and other side-effects which can be generated when treble frequencies are boosted or enhanced. This is followed by the variable De-Ess which acts as a 'more' control giving up to 20dB of gain reduction at the selected frequency. The MX50 has two modes of operation: Split Band de-essing Recommended for the majority of applications, this mode splits the audio spectrum into two bands with the split point being dictated by the position of the Frequency control. Only frequencies above the split point are attenuated. Full Band de-essing A useful alternative where unobtrusive minimal processing is required. This mode reduces the total signal level in response to sibilant peaks in the selected frequency band. Further features are also incorporated to improve ease of control and flexibility: Floating Threshold System: This intelligent Drawmer circuitry has a floating Threshold that adapts to the dynamics and level of the incoming material, eliminating the need for a manual Threshold control and creating more natural results. Air function: As sibilance rarely occurs above 10KHz this feature adds back high frequency 'gloss' in excess of 12KHz preserving upper harmonics and increasing the transparency of operation. Frequency: This control selects the frequency band in which the de-esser operates. In Split Band mode this control also determines the split point above which gain reduction will take place. The control is continuously variable from 800Hz to 8KHz and covers the full sibilant range. De-Ess: Adjusts the amount of gain reduction that will take place when a sibilant sound has been detected. Up to a maximum of 20dB may be applied. This control uses an intelligent Floating Threshold circuitry which removes the need for a manual De-Ess Threshold control. One of the benefits of this design approach is that during quiet passages the sibilants are held to a level which is relative to the original signal. Split Band De-Ess: Split Band operation will only reduce the selected frequencies above the value set via the Frequency control. In most situations this mode, in conjunction with the Air function, offers the most transparent de-essing. Status LED illuminates when engaged. Full Band De-Ess: Full Band operation will reduce the total signal level in response to signals in the selected frequency band. Status LED illuminates when engaged. Air: The Air control enables frequencies above the sibilant band to be retained, greatly increasing transparency of the de-essing process. During normal use it is recommended to keep the Air function active for both Split Band and Full Band de-essing. Status LED illuminates when engaged. Link: Depressing this switch configures the unit for stereo operation where the average left/right signal level is used as the Floating Threshold. In linked mode the red status LED beneath the link switch will illuminate. De-Ess Gain Reduction Display: A nine segment LED bargraph shows how much gain reduction is being applied up to a maximum of 20dB. In Full Band mode gain reduction is applied to the whole signal, whilst in Split Band mode only frequencies above the value set on the frequency control are subject to gain reduction Bypass: The Bypass position routes the input signal to the output with no processing. These switches are independant of any linking and will only bypass their respective channel. Status LED illuminates when engaged.

Drawmer

About Manufacturer

The Beginning: The name Drawmer is synonymous with professional signal processing in recording studio, broadcast and live sound reinforcement environments. The company which is based in Yorkshire, England was founded by Ivor Drawmer whose passion was designing audio circuits. "The whole thing started in 1981," explains Drawmer. "I had been playing keyboards with bands in Yorkshire, but that wasn't going so well and also I wasn't getting any younger. With the encouragement of friends I built a small batch of stereo delay lines, which I called the Multitracker, and that was the start of Drawmer." The DS201 Gate: In 1982 Drawmer revolutionised gating by introducing the DS201 Dual Noise Gate, the world's first 'frequency conscious' noise gate. "It came about from working with a producer called Phil Chapman, who wanted me to build him a gate. Without doing any research I built this thing that switched on, held for a certain amount of time and then just switched off. In practice of course it was no good at all, so I then spent some time going around studios looking at how gates were being used. What really surprised me was how long engineers spent fiddling with gates trying to get them optimally set up and I realised very quickly that a better design was needed." The DS201's unique High-Pass and Low-Pass key filters, comprehensive envelope control and ultra-fast attack time has since made it the 'industry standard' gate throughout the world. The 201 transformed the gate from what had previously been a simple "on/off" device to a powerful creative tool playing a significant role in modern music production. "It was the kind of unit that people discovered uses for and it immediately enabled engineers to do the things they'd always dreamed of with minimum fuss," says Drawmer. Very little has changed to the design of the DS201over the years, and Ivor Drawmer claims it sells as well now as it did back in the early 1980s. "It's astounding where they all go, but to date we've sold tens of thousands of units," he says. The 1960 Mic-Pre/Tube Compressor: In 1984 Drawmer released the original 1960 Mic Pre-Amp/Vacuum Tube Compressor which combined two high performance mic pre-amps, two 'soft knee' tube compressors and an instrument pre-amp with EQ. The 1960 was the first self contained 'front end', and for many recordists who required only one or two microphone input channels it replaced the mixing console, assuring the user of a high quality signal path with a 'distinctive' sound. The concept of the 1960 was to combine the 'warmth and character' of eight active tube stages with the low noise and reliability of solid state electronics. The 1960 has been adopted by producers and musicians around the world and acclaimed as the ultimate direct interface between the sound source and the recording medium. Although the basic design and features of the 1960 remain the same to this day, periodic upgrades have been performed, the latest being the addition of high-pass filters and overload LEDs to the mic pre-amp. As the retro movement has escalated, Drawmer says there has been a dramatic surge in 1960 sales which now puts the unit on a par with the gates. Programme Adaptive: During 1989 Drawmer developed a new proprietary gating circuitry which it entitled 'programme adaptive'. This intelligent auto-circuitry was capable of analysing the dynamic content of the incoming signal and constantly optimising the 'attack', 'hold', 'ratio' and 'release' parameters thereby creating a much smoother gating action than previously available. The first products to incorporate Drawmer's 'programme adaptive' circuitry were the DL241 Auto Compressor released in 1990 and the DS404 Quad Noise Gate released in 1991. Also developed in 1989 was a new limiter circuitry which performed 'Zero Overshoot', 'Zero Response Time' transparent limiting. This was also included in the DL241 Auto Compressor and later the DL441 Quad Auto Compressor Limiter. In 1992 Drawmer took the innovative step of incorporating their newly developed 'Dynamics Spectral Enhancement' circuitry into a high quality compressor/limiter which enabled the user to dynamically boost any high frequency energy lost during the full band compression process. The resulting product, the DL251 Spectral Compressor was enthusiastically received by the mastering, broadcast and studio industries. The 1961 Tube Equaliser: With the new series of compressors becoming established amongst professional users Drawmer decided to expand its range of tube products and in 1994 released the 1961 Vacuum Tube Equaliser. An interesting 1961 design feature was the inclusion of a variable input level control on each of the two channels. This design approach allows the user to control the amount of 'warmth' by deciding how hard to drive the tubes giving a sound as 'clean' as the best discrete solid state designs or as 'hot' as the 'hottest' vintage tube models. The 1962 Digital Vacuum Tube Pre-Amp: The 1962 Digital Vacuum Tube Pre-Amp is a hybrid combining solid state, valve and digital technology. It comprises a high performance stereo analog pre-amp with 3-band EQ, low and high pass filters, low and high frequency dynamic enhancement, limiting and variable tube drive which feeds directly to 24-bit A/D converters. As well as analog outputs the 1962 is equipped with AES/EBU, SP-DIF and Tascam's TDIF or Alesis ADAT digital interfaces. "The concept is to offer very high quality analog with optional processing and tube warmth before converting to digital via the high resolution converters," explains Ivor Drawmer. The MX Series: In contrast to the 'high end' 1962, the MX30 Gated/Comp/Limiter and MX40 Punch Gate are low cost entry level dynamics processors bringing Drawmer's professional processing into a wider M.I. market place. The MX range has recently been expanded with the MX50 Dual De-Esser and MX60 Front End One. Digital Masterflow and Future Developments: Digital technology features strongly in Drawmer's future products, and the new Masterflow range of processing units translate some of Drawmer's existing designs into the digital domain. The company has also joined the growing list of manufacturers working on a series of TDM software modules for Digidesign's Pro Tools System and has recently developed a plug-in for the Mackie D8B Digital Console. Ivor Drawmer now works in conjunction with a team of highly qualified technicians with both analog and digital skills. Their design brief is to continue to create innovative and unique products based on feedback from the Sales and Marketing department and the Drawmer International Distributor network.

Specifications

MX50 TECHNICAL SPECIFICATIONS (Measurements taken using +4dBu balanced XLR input where applicable) INPUT IMPEDANCE 20K Ohms (bal), 20K Ohms (unbal) MAXIMUM INPUT LEVEL +21dBu INPUT CMR > -40dB OUTPUT IMPEDANCE 50 Ohms (bal), 100 Ohms (unbal) MAXIMUM OUTPUT LEVEL +21dBu BANDWIDTH 12Hz to 51KHz -1dB CROSSTALK @ 35KHz -98dB @ 1KHz below noise level NOISE Wideband (worst case) 22Hz - 22KHz AV -99dB -95dB DISTORTION Typical Input 100Hz 1KHz 10KHz Unity Gain, +4dBu input <0.03% <0.02% <0.03% +14dBu input, 10dB Gain Red <0.2% <0.2% <0.2% POWER REQUIREMENTS 115Volt or 230Volt at 50-60Hz, 9 Watts FUSE RATING T32mA for 230Volt, T63mA for 115Volt CONFORMING TO BS EN 60127-2:1991 SHEET III FUSE TYPE 20mm x 5mm, Class 3 Slo-Blo, 250Volt working CASE SIZE 482mm (w) x 44mm (h) x 200mm (d) WEIGHT (incl packaging) 3.2 Kgs

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