BEHRINGER MDX1400 - Manual

6 AUTOCOM PRO MDX1400 1. INTRODUCTION In purchasing the new AUTOCOM PRO Model MDX1400, you have acquired an extremely efficient and universal dynamics processor, which combines the most commonly used dynamic functions within a compact stereo unit: every channel has its own independent Compressor/Lim...

9 AUTOCOM PRO MDX1400 2.2 Compressor Section 11 14 16 17 13 10 8 9 7 6 15 5 12 Fig. 2.3: Control elements of the compressor section 5 The THRESHOLD control sets the threshold point for the compressor section. It has a range of -40 to +20 dB. If the channel is switched to INTERACTIVE mode (Interactiv...

10 AUTOCOM PRO MDX1400 15 The SC FILTER switch activates a highpass filter in the sidechain path and thus limits the influence of low frequencies on the AUTOCOM PRO’s control processes. 16 The 12-digit GAIN REDUCTION meter indicates how effectively the gain is reduced by the compressor, within a ran...

12 AUTOCOM PRO MDX1400 Clipping In contrast to the two previously mentioned limiters, the clipping mode features infinitely fast control times, an infinite compression ratio and creates an unsurpassable barrier (“brickwall”) for all signals above a certain level. To be able to control the signal pea...

14 AUTOCOM PRO MDX1400 3.2.4 Reducing Feedback In Stage Mics When a singer is using a vocal mic, their voice effectively stops other sounds from entering the mic. But in pauses between the singing, the mic will pick up noise from the house PA and monitors, which can lead to unpleasant feedback probl...

16 AUTOCOM PRO MDX1400 The experienced user will be in a position to specify parameters while in bypass mode and thus realize the effect before the unit is actually switched into operation. This is important in live situations, where a signal needs to be managed efficiently by the engineer, without ...

17 AUTOCOM PRO MDX1400 0 dB -20 dB No Gain Reduction 20 dB Gain Reduction Without Enhancer With Enhancer Frequency Output Fig. 3.3: The frequency response with and without dynamic enhancer 3.4.1 Initial Settings For The Dynamic Enhancer Section Turn the PROCESS control beginning from “Off” to a valu...

18 AUTOCOM PRO MDX1400 4.1.1 The AUTOCOM PRO In Digital Recording And Sampling In an analog recording, too low recording levels lead to an increased noise level, whereas too high levels will cause a compressed and “squashed” sound. In extreme cases, it will cause distortion due to tape saturation. I...

19 AUTOCOM PRO MDX1400 the midrange/tweeter range caused by high-energy bass signals! This statement, as paradox as it may seem at first, can be explained with the fact that especially low-frequency signals with high amplitudes can overload the power supplies in the amplifier(s). The resulting clipp...

20 AUTOCOM PRO MDX1400 5. EXTERNAL SIDECHAIN APPLICATIONS 5.1 The Sidechain Function With the AUTOCOM PROs sidechain function you have a very useful external control option. By activating the SC EXT switch, the AUTOCOM PROs control path is disconnected from the audio input and therefore interrupted....

21 AUTOCOM PRO MDX1400 Control Setting SC EXT switch IN SC MON switch OUT INTERACTIVE switch OFF SC FILTER switch OUT THRESHOLD control +20 dB RATIO control 1:4 AUTO switch OUT ATTACK control 0,5 ms RELEASE control 200 ms OUTPUT control 0 dB Tab. 5.1: Initial settings for the De-Esser functions 5.2....

22 AUTOCOM PRO MDX1400 5.4 “Voice-Over” Compression (“Ducking”) The BEHRINGER AUTOCOM PRO can be used to automatically reduce music to a background level, when an announcer is speaking through a microphone. For this purpose, the BEHRINGER AUTOCOM PRO is used as an automatic fader and is controlled b...

23 AUTOCOM PRO MDX1400 Ear Microphone Amplifier Power Amplifier T ape Recorder Radio Cassette Recorder P/dB 140 120 100 80 60 40 Fig. 6.1: The dynamic range capabilities of various devices It is therefore useful to keep the operating level as high as possible without risking signal distortion in ord...

24 AUTOCOM PRO MDX1400 of distortion or, for example, to avoid loudspeakers being damaged by overload, Compressors or Limiters are used.The principal function used in these devices is dependent on an automatic gain control as mentioned in the previous section, which reduces the amplitude of loud pas...

25 AUTOCOM PRO MDX1400 7.1.2 Transformer Balanced Outputs (Optional) In contrast to electronic balancing, the use of transformer-balanced outputs offers the advantage of galvanic separation between units. Electrical potential differences and ground loops in audio installations do not therefore impai...