What kind of mixer?

Number of visits: Date:2016-04-13

Mixer (Audio MixingConsole) is a frequently used device in the sound system and audio and video recordings. It has a multi-channel input acoustic signal for each channel can be handled separately, for example: You can zoom in to compensate for the sound treble, alto, bass, and to increase the charm of voice input, the sound source for road space positioning; You can also mix all kinds of sound, mixing ratio adjustable; with a variety of outputs (including left and right stereo output, edit output, mixed mono output, monitor output, recording output, and various auxiliary output, etc.). Mixer plays a central role in many of the system it is not only the creation of stereo sound landscaping, and noise suppression, control volume, sound art is essential to deal with a machine.

First, the type of mixer

Mixer in terms of number of input channels, quantity, etc., and an output indicating panel function keys there are differences, in fact, mastered using the mixer, to examine its overall go through the actual operation and connection, natural practice makes perfect. Mixer is divided into three parts: input part, bus part, the output section. Busbar input and output portions linked, constitute the entire mixer.

Depending on the purpose and use of the occasion, the mixer is divided into the following categories:
(1) stereo field production mixer (Stereo Field Production Console)
(2) Recording Mixer (Recording Console)
(3) Music Mixer (Music Console)
(4) Digital strobe mixer (Digital Routing Mixing Console)
(5) with professional amplifier mixer (Powered Mixer)
(6) radio broadcast console (On Air Console)
(7) Mixer theater (Theatre Console)
(8) sound console (P.A. Console)
(9) Cable broadcast console (Wired Broadcast Mixer)
(10) Portable Mixer (Compact Mixer)

Second, the role of the mixer outlet, function keys
(A) part of the mixer input jack, function keys

① XLR socket MIC: namely microphone socket, on which there are three jacks, labeled 1,2,3. Reference numeral 1 is a ground (GND), the machine is connected to the chassis, the chassis as 0 volt level. Reference numeral 2 is the warm end (the Hot) or said high (Hi), which is one end of the transmission signal. Numeral 3 is the cold side (Cold) also known as the low-end (Low), as the other end of the transmission signal. 2 and 3 for the same impedance relative to 1, and as seen from the input impedance is low, so called low-impedance balanced input jack. Its strong anti-interference, low noise, generally used for wired microphone connections.

② line input (Line): It is a 1/4 "TRS jack, 1/4" TRS connector (TRS), the tip (Tip), ring (Ring), a sleeve (Sleeve), as a balanced input signal. You can also use 1/4 "sophomore core plug (TS) as a balanced signal input. Input impedance is high, generally used for sound input jack of the other sources in addition to the microphone outside.

③ into the socket (INS): It is a special socket used, usually is on the inside, when you need to use, insert a 1/4 "TRS connector, the acoustic signal line input or microphone input from the tip (Tip) to lead, after the external device processing, and then by the ring (ring) the acoustic signal tone ④ return value attenuation (PAD): press this button, sound signal input (usually a sound signal input terminal of Line ) attenuation 20dB (ie 10 times), and some mixers, the attenuation value of 30dB. it is suitable for a large acoustic signal input.
⑤ gain adjustment (Gain): It is used to adjust the input audio signal amplification amount, which when combined with PAD can input acoustic signal into the mixer at high SNR, low distortion in the best condition, which is available adjust the road in peak indicator light does not shine for best.

⑥ low-cut keys (100Hz): Press this key component of the input frequency sound signals below 100Hz component removed. This key is used to sound less favorable environment, often low-frequency hum of the occasion and the low-frequency sound easily absorbed sound environment.

⑦ equalization (EQ): It is divided into three bands: high frequency (H.F.), the band (M.F.), low frequency (L.F.), mainly used for sound compensation.

. A high frequency band (see Figure 1-2 (a)) (H.F.): Tilt point frequency is 10kHz, failure to mention the amount of 15dB, this band is mainly compensated sound clarity?.

. B the band (MF) (see Figure 1-2 (b)): adjustable center frequency, ranging from 250Hz 8kHz; valley point to mention the amount of decay is 15dB; this frequency range is very wide, compensation is around?? a center frequency. If the center frequency falls in the high frequencies, mention bad brightness knob compensation sound. If the center frequency falls in the low frequency range, to mention compensation for sound attenuation intensity knob.

c low frequencies (see Figure 1-2 (c)). (L.F.): tilt point frequency is 150Hz, failure to mention the amount of 15dB, this band is mainly used to compensate the fullness of sound?.

⑧ Auxiliary Knob (AUX1 / AUX2 / AUX3 / AUX4): adjust these auxiliary knob to adjust the way the sound is equal to the corresponding auxiliary bus rushed to the size where AUX1 and AUX2 acoustic signal before the fader (Fader) drawn from, not fader affected. AUX3 and AUX4 acoustic signal is drawn out of the fader (Fader) after from the big fader by regulation. The former is marked with Pre, which is marked with the Post.

⑨ panning (PAN): it is used to adjust the way the sound source distribution image in space. When the left adjustment, which is equivalent to the sound source on the road listening to the left. When the right adjustment is equivalent to the sound source on the right road listening. If it is placed in the middle position, which is equivalent to the sound source on the road listening to the middle. In fact, this knob is used to adjust the knob to the left and right sound source distribution, its creation stereo output mixer is extremely important.

⑩ attenuator (Fader Fader): The key is to adjust play two roles: on the one hand is used to adjust the way the sound mixing ratio in the mixing, pushed up the proportion of large, pull down a small proportion; the other hand, the way to adjust the sound source distance distribution, pushed up loud, the equivalent of the sound source on the road close to the location of the sound, pull down, small voice, the sound source corresponds to the road in a remote location sound. It can be combined with the PAN to create each sound source spatial distribution of surface. Creation stereo output mixer, using a Fader and PAN function keys.

11 monitor button PFL (Pre-FadeListen condensing set): Listening attenuation before pressing it with headphones plugged into the headphone jack on the console will be able to hear the sound signal before the fader.

12 ON button On: press it, the access channel audio signal mixer for mixing.

13L-R button: press it, the left and right channels sent to the bus after the sound signal by way faders, PAN.

141-2 button: press it, the sound signal by road after Fader and PAN sent to group busses 1 and 2.

153-4 button: press it, the sound signal by road after Fader and PAN sent to group busses 3 and 4.

Mixer species are many, but the main function keys are the same. It is worth mentioning that each mixer input only into a sound source, otherwise, they will interfere with each other, the impedance unworthy, causing sound distortion.

From entry to the master console Fun

(B) the output of the mixer section

Arrangement mixer output section has the following rules

(1) There are a few bus mixer, there must be corresponding outlet.
(2) each of the acoustic signal output connector certainly the mixer equipped with its corresponding control key, push button may be, it may be knob.
(3) next to each output adjusting function keys are equipped with a monitor button, push button next to the general listener to push the button before listening PEL, knob button next to the monitor through the monitor knob
(4) from the secondary return (AUX RET) or effect return (EffectRTN) jack into the signal mixer, certainly mounted buttons to adjust its size and the corresponding pan controls
(5) Where the left and right front output or edit the output socket, generally corresponding INS (and out again into jack), which aims to separate the output signal can be output before special processing, but do not install auxiliary output INS jack.
(6) If the output portion with the earphone jack and intercom microphone T.B.Mic generally have bypassed its volume knob. If you master the law of more than 6, then the function key role in the output section of the mixer will be well aware of.

TypeInfo: Sound Knowledge

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