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Actually, the so-called grouping is how many similar microphones and lines are programmed together, and the dexterous operability is improved, and then each group of signals is sent to the main output. Because if you want to adjust the line and the speaker at the same time, the operation of the fader will not be taken care of. So you can group them in a group, so you can directly adjust the between them by grouping the faders.
Let me give you a few examples. At a large performance evening, a 32-way mixer with 6 groups, 16 input for the instrument part; 8 inputs for hosting and singing mic; lavalier for applications such as chorus parts or comics And the helmet type mic occupies 8 inputs; in the live performance, if you want to adjust the line and microphone between the whole at the same time, it is determined that the operation of each fader is not enough, which brings great operation difficulty, etc. A series of problems. At this time, it can be solved by the functions of the grouping at that time. The 16-channel input of the instrument part is programmed into 1-2 groups (the fader of the band's sound image adjustment and volume is adjusted at that time); the host and the mic account for 8 channels of input into 3-4 groups; the chorus part Or the lavalier and helmet-style mic applications such as comics are composed of 5-6 inputs; then 6-way groups are entered into the main output.
In this way, through grouping, it is possible to master the mobility of the whole party in a complete and good manner. To make a metaphor, when the host makes a speech such as opening a game or playing a game, it is necessary to bulge the sound of the speaker, and the background music. (Musical part) The sound is smaller. What should I do at this time? If you follow the operation of each fader on the instrument part, it will not work. Then the grouping can be well controlled, and the faders of the group (the instrument part) that pulls down 1-2 can hold the volume of all the parts of the instrument, but have no effect on the other.
The mixer is the most important equipment in the professional audio system. A professional audio system is often centered on the mixer. The commonly used mixer can receive 8-24 different signals at the same time, and distinguish between these signals. The tone and the length are adjusted for processing. Individually, the console has four important functions.
1. It is to enlarge the program signal. When the signals of different program sources enter the mixer, the amplification batches required for different signals are not the same, so the mixer must be able to separate and process different signals. For example, the musical signals and vocal signals of various instruments are different in amplitude, and of course, they need to be processed separately.
2, is the separation of various signals for frequency adjustment (ie tuning). We know that different signals, because of their spectrum spread, harmonic components, etc., constitute different timbres, and the influence of the building on the sound makes the tone change a lot. The sound engineer should process the different sound signals entering the mixer according to different sound-amplifying environments, so that the sound is as close to the original sound as possible. Each channel of the mixer has the same disposition handle, such as: 3 segments. Balance, gain gripper, high pass filter, etc.
3. It is the combination of signals. After the mixer adjusts the various signals, it is necessary to combine various signals into the scale left and right channel (breaking body sound) situation output, which is the input signal application of the next level equipment, which is the most basic function.
4, is the function of the mixing console in addition to the main output of the broken body, but also can provide more than two channels of help output signals, this type of signal has two uses, one is the sound room monitoring or the stage to listen; second is to do the consequences The encouragement signal is used.
In the large symphony, the function of the formation is more reflected; the compilation of the symphony is based on the reality of hundreds of years, and it is more superstitious, and its composition is; the string part: v1, v2, v, v , v shell (v is the violin); wood tube music part: clarinet, oboe, flute, big tube; brass music part: small, horn, trombone, large; percussion part: bass drum, snare drum , 镲, bell, bell triangle iron plate; mixer: 42 channels mono input, 8 groups.
String parts: v1, v2, v, v large, v shell (v is violin) compiled into 1-2 groups; woodwind parts: clarinet, oboe, flute, large tube braided into 3-4 groups; copper Wind music part: small, horn, trombone, large size for 5-6 group; percussion sound department: bass drum, snare drum, cymbal, bell, bell, triangle iron, plate for 7-8 groups. Finally, the 8 way group is entered into the main output. This directly adjusts the field ratio between the sound part and the part of the instrument through the grouping.
In large conferences, the grouping function can also reflect its strengths, 42 roads, 8 groups. If you are alone in the operation of each mic pickup, it is easy to cause mistakes and cause bad taste. If you turn all the mics at the same time, feedback and unnecessary external noise will easily occur. Grouping can help you solve the problem by first dividing the status of all the microphones into several zones, and then grouping each zone into each group. The grouping is entered into the main output, so that the grouping of the general location is picked up by the grouping.
Thus the visible grouping above is very powerful, rather than being used as a help output. Of course, the grouping can still be used for back-to-back in the case of a brief presentation and sufficient premise, which is more practical.
In the large-scale audio theaters and indoor performances, many engineers and sound engineers have neglected the true meaning of the grouping. Many of them use the group as a kind of help output, such as listening and monitoring.