Audio Mixer

Mixer is a tool to adjust the electrical signal from the studio microphone , tape recorder , and signal processors . Operators move this isarat with knob / button , and then redirect the signal to a tape recorder , signal processors , power amplifiers and monitors . but now has many out audio mixer that not only serves as pencampursaja but also as an audio processor is called consul or too many who call with mixer consul .
By type, the mixer is divided into two analog mixer and a digital mixer . In terms of function , which is to mix both sound vibrations transmitted by the input or it could be by the microphone . Input on the mixer there are two types namely the type of balance ( 600 ohm ) and unbalanced inputs ( 1.2 K OHM - 47 K OHM ) .
Analog mixer
Analog mixerSebuah analog signal using a full wave unut encode data values ​​continues. The size of the character values ​​of the wave is equivalent to a data value or can be converted to a data value with a simple mathematical function . For example , assume that the data to be encoded into the form of an analog signal using frequency sound . 100 numeric values ​​can be encoded by setting the values ​​to 100 Hz . 9999.9 numbers can be encoded by setting the frequency to 9999.9 Hz . As long as the value of the data is still in the frequency range of the data values ​​can be encoded and detected using a signal .
The analog signal is essentially continuous in nature . They represent the data values ​​in the range or value . Theoretically , the value of which can be encoded is infinite . Example , are in the range of voltage ( 0-10 V ) , still there are some who can not use a voltage of 4.1 V. The number of voltage difference is within the range limited by the ability of the sender to generate the voltage , transport mechanisms , and the receiver to distinguish the signals.
Digital Mixer
Digital Digital mixerSinyal can contain a certain number of possible values ​​. More appropriate term is a discrete signal , discrete diamana means that the rate can be calculated from all possible values ​​. In terms of the number of bits represented value , then the encoding of the signal can be divided into a binary signal , trinary signal , and so on .
Digital signals can also be generated from a square wave as the carrier wave . Square wave has an amplitude shift is not so clear between the two waves of different values ​​. Square wave can be dihasikan through the exchange of quick or mulching , an electrical or optical energy source . Transmission of binary data over a square wave is usually called pulse code modulation ( PCM ) or on- off keying ( OOK ) .
Delivery with a square wave is a favorite method to transmit data over short distances , for example , a computer system bus . But shortwave less reliable for long-distance transmission , as engiriman a distance of more than one kilometer . Loss of energy , electromagnetic interference , and noise generated in the cable delivery united beat acuity using a square wave . Pulse also tends to spread when meeting with the media . Without a change in voltage level it , the receiver can not properly translate code . Optical wave box has the same problem , although not as bad as the first . Data Data ditranmisikan melelui considerable distance ( several uluh kilometers ) using fiber optic good . Characteristics such as frequency and amplitude of the waves can not be calculated easily . For example, the electrical voltage can achieve 0 ; 0.1, 0.001 , 5 , 10, 100 , and many other values ​​. To send a digital signal to an electric voltage , the sender and receiver choose two different values ​​, such as 0 's 5 , to represent two different bit values ​​. But the voltage delivered to the recipient is not always 0 or 5 . then how the receiver to translate a value of 0 and 1 were kirimannya difficult to ascertain , for example 3.2 can be interpreted as 0 , 1 , or not ?
Digital signal transmission scheme defines a range of values ​​to represent each wave character bit value . Whatever value is in the range below represents bit 0 , da whatever value is in the range above represents a binary 1 . line dividing the two is called the threshold range . Sender encodes bit values ​​by sending a special voltage , such as 0 volts for bits 0 and 10 volts for bits 1 . Receiver translates the voltage by comparing it with a threshold , then the voltage was assumed to have a certain bit value . If you are under niali threshold is assumed to have the value of bit 0 .