The mixer is also called tuning console, it will be a multi-channel input signal amplification, mixing, distribution, quality modification and sound effect processing, is an important equipment for broadcasting and recording program for modern radio, stage of amplifying sound, sound production system. The mixer according to the signal out mode can be divided into: analog mixers and digital mixer.
The mixer Mixer in the input channel number, surface functional version of number of keys and an output indicating etc. there are differences, in fact, to master the use of the mixer, the overall up to examine it, through the actual operation and connected, natural Skill comes. The mixer is divided into three parts: input, output, bus part part part. Busbar part of the input part and output part together, constitute the entire mixer.
The functions of the mixer
Before using the mixer, the mixer function we have full understanding of the. The mixer is the most important professional sound system equipment, a professional sound system is often based on the mixer core. The mixer used can also accept 8~24 signals, and each of these signals in the tone and amplitude adjustment processing. In general, the console has four main functions.
The first function is to amplify the signal of program. Signal when different source programs into the mixer, the amount required for the different signals are not the same, so the mixer must be treated separately in different signal. As the music signal of various musical instruments and voices signals it is not the same in magnitude, of course you need to separately.
The second function is respectively for various signal frequency adjustment (i.e. tuning). We know, different signal, due to its spectral distribution, causes of the harmonic components, forming a different tone, and the impact of buildings on the timbre of sound to make huge changes. Sound engineer according to the amplifying different environment, different sound signals to enter the mixer are manufactured respectively, making it sound as close as possible to the original sound. Each channel mixer has the same processing means, such as: 3 EQ, gain controller, high pass filter etc..
Third is the signal of the merger. The mixer will signal is adjusted to the left and right channels, various signals into the standard form (stereo) output, is used as the input signal of a next stage equipment, which is the most basic function.
Fourth is the distribution function. The mixer besides going out main transport of stereo, but also provide auxiliary output signal of two or more channels, this kind of signal has two purposes, one is the audio room or back stage to listen to; two is the stimulating signal effect for.
It was also features simple sum for:
* the pickup signal, amplification
* high, bass tone equalization according to need
* marshalling control signal according to the needs of into or around the bus
* the signal into the auxiliary bus artistic treatment
* output control according to the requirements.
But, no matter how expression, its function is the same. All work must be to the tuner of the mixer's function as the core to start. Skills
The function and the function partition mixer we have a clear understanding, then, the next step we will be able to carry out specific regulation of mixer. Skills have many ways, but mainly summed up is the sound quality, volume adjustment, voice signal to compensate the art processing, here mainly about the first two.
1 sound compensation
Sound compensation mixer is for processing combined with sound source, is not only the technology is artistic, but also to the audience and the combination of auditory psychology. Sound compensation is the use of sound quality compensator, adjust the center frequency of each band to change the timbre. Sound compensation must follow the following principles.
(1) bass compensation
16Hz ~ 64Hz for the bass, existing instruments can play the bass is a pipe organ, it can play 16Hz, such a low frequency human ear is generally not to hear, but the body can feel; from 20Hz ~ 64Hz ear can hear, but must use the hi fi equipment to play out. From 63Hz to 250Hz is the bass region, it is the priority among priorities we bass compensation, this band is very important for music, it is the basis of music, bass rhythm type instruments belong to this band, this kind of musical instrument sound quality adjusting quality, deciding the music skeleton is complete. Therefore, the low frequency characteristic to use flat line, this can make the full sound and natural, of course, can also according to the instrument requirements and preferences to compensate.
(2) the Alto compensation
From 250Hz~2000Hz in the bass region, this band in the transmission and recording process the less susceptible to loss, is the backbone of the sound. 2000Hz ~ 4000Hz is the treble area, definition of this band of sound and bright degree have important contributions, is our most important control object. If the sound muddy, timbre too dark can enhance the band, sound attenuation excellent can make it soft, voice muffled can improve to make it bright, but too much, promote sound will harsh. Language or songs usually have to adjust this band.
(3) soprano compensation
From 4000Hz to 8000Hz for the treble area, to high pitched voice characteristics can be kept flat line, keep the flat line characteristics of natural is good. Also according to the content of music and sound source characteristics to the corresponding attenuation or enhancement, but must pay attention to is, whether attenuation or enhancement should be moderate and not too much, otherwise it will not sound since
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