13Dynamic Compression ProcessAs the name implies, compression reduces the dynamic range of a signal. It is usedextensively in audio recording, production work, noise reduction, and live performanceapplications, and needs to be used with care. A compressor is basically a variable gaindevice wherein the amount of gain used depends on the level of the input. In this case,the gain will be reduced when the signal level is high, making louder passages softerand reducing the dynamic range.A compressor’s input/output relationship can be illustrated by a simple graph:The horizontal axis corresponds to the input signal level, and the vertical axis is theoutput level (both measured in decibels). A line at 45 degrees corresponds to a gain ofone — any input level is mapped to exactly the same output level. The compressorchanges the slope of that line (makes it more horizontal) above some value called thethreshold (which is most often adjustable). The height of the line defines the dynamicrange of the output, and the slope of the line is the same as the compressor's gain.Stereo 2 Bands CompressorThe DigiComp 16’s Stereo 2-bands dynamic process algorithm is based on a"multiband" process concept, splitting the full band of the input signals into 2"sub-bands" — the low frequencies band and the mid/high frequencies band — in orderto differentiate the dynamic processes operating on the low frequencies (with higherenergy content) and the mid/high frequencies (with lower energy content).8Installation and Connectiontions and Power Ups between the DigiComp 16 and other audio devices have to be madeity cables to insure optimum performance of this unit. It is best to use lowelded cables with a flexible internal conductor. Connect the cables to theobserving the following precautions:audio cables with AC power cords.udio cables and DigiComp 16 near sources of electromagneticuch as transformers, monitors, computers, etc.cables by firmly grasping the body of the plug and pulling directlyables where they can be stepped on.a cable or having it make sharp, right angle turns. Before powering up16, check that all connections have been made correctly.lume controls of the amplifier or mixer. Insert the Power plug into theon the rear panel of the DigiComp 16 and plug the power adapter intoTurn on the power of the amplifier/mixer and adjust the volume.iring16’s LEFT INPUT (12) jack is also the mono input for the unit. If you onlye mono cable to the LEFT INPUT (12) jack, it will also be routedthe RIGHT INPUT (13). However, if you are using stereo input signalscting a cable to the RIGHT INPUT (13) jack, the automatic routing will beleft input cable will feed only the LEFT INPUT (12), and the right inputnly the RIGHT INPUT (13).gf the input andcrucial in orderaximumratio. It isset both inputl controls at 3/4mum. This willssibility ofion and keepackground noise to a minimum. If the Signal LED (4) on the DigiComp 16ing a process saturation, turn down the INPUT LEVEL (1) or decreasee source (instrument, mixer send, etc.). If the unit level is causing thedistort, turn the OUTPUT LEVEL (2) down.et 1/23/03 10:33 AM Page 16