Sound knowledge

There are those kinds of mixer

时间:2015-05-28 09:50来源:未知 作者:admin 点击:
Audio MixingConsole is a device often used in sound system and video recordings. It has multiple input, sound signal for each channel can be handled separately, such as: zoom, for sound compensation treble, alto, bass, giving voice input increases charm, the way to make space for positioning the sound source; sounds can also be mixed, the mixing ratio is adjustable; with a variety of output (including left and right stereo output, editing output, mixed mono output, monitor output, recording output, and various auxiliary output, etc.). Mixer plays a central role in many systems it is not only the creation of stereo sound landscaping, and noise suppression, control volume, sound art process is essential to a machine.
First, the type of mixer
Mixer in terms of number of input channels, and an output indicative quantity, etc. panel function keys there are differences, in fact, master the use of the mixer, to examine its overall go through the actual operation and connection, naturally makes perfect. Mixer is divided into three parts: an input section busbar, the output section. Busbar input and output portions linked to form the entire mixer.
Depending on the purpose and use of the occasion, the mixer is divided into the following categories:
(1) Stereo Field Production Console
(2) Recording Console
(3) Music Console
(4) Digital Routing Mixing Console
(5) Powered Mixer
(6) On Air Console
(7) Theatre Console
(8) P.A. Console
(9) Wired Broadcast Mixer
(10) Compact Mixer
Second, the role of the mixer outlet, function keys
(A) part of the mixer input socket, the function keys
① XLR jack MIC: namely, microphone jack, on which there are three jacks, labeled 1,2,3. Numeral 1 is GND, connected to the machine cabinet, the cabinet as a 0 volt level. Numeral 2 Hot or said Hi, it is at one end of the transmission signal. Numeral 3 is a Cold or said Low, as the other end of the transmission signal. 2 and 3 for the same impedance relative to 1, and viewed from the input impedance is low, so called low-impedance balanced input jack. Its strong anti-interference, low noise, generally used for wired microphone connection.
②Line: It is a 1/4 "TRS socket, using the 1/4" TRS, Tip, Ring, Sleeve, as the balance of the input signal. You can also use 1/4 "TS as a balanced signal input. Its input impedance is high, generally used for the input jack of the other sound sources other microphone outside.
③INS: It is a special use of socket, usually inside in the ON state, when the need to use, insert the 1/4 "TRS plug, the sound signal line input or microphone input from Tip leads to, via the external After the device processing, and then the sound signal to return from the Ring tone setting ④ attenuation (PAD): press this button, input acoustic signal (usually acoustic signal Line-ended input) attenuation 20dB (or 10 times), there is The mixer, which attenuation of 30dB. It is suitable for a large acoustic signal input.
⑤Gain: It is used to adjust the input audio signal amplification amount, which when combined with the PAD can make the sound signal input into the mixer at high SNR, low distortion in the best condition, that is, the path can be adjusted peak indication For bright light does not shine in the best condition.
⑥ low-cut keys (100Hz): Press this key component of the input frequency sound signals below 100Hz components removed. This key is used to poor sound environment, often low-frequency hum occasions and low frequency sound easily absorbed sound environment.
⑦EQ: It is divided into three bands: HF, MF, LF, is mainly used for sound compensation.
aHF: tilt point frequency of 10kHz, mention the amount of attenuation 15dB, this segment is mainly compensated sound clarity .
. b MF: adjustable center frequency, ranging from 250Hz 8kHz; failure to mention the amount of the valley point of 15dB; this band is very wide range, compensation is around a center frequency  . If the center frequency of falls in high frequency, brightness knob compensation mention bad sound. If the center frequency of falls in the low frequency, intensity knob compensation mention bad sound.
cLF: tilt point frequency of 150Hz, raise the amount of attenuation 15dB, this band is mainly used to compensate the fullness of sound .
⑧ AUX1 / AUX2 / AUX3 / AUX4: adjust these auxiliary knobs, equal to the adjustment to the way the sound sent to the corresponding auxiliary bus size which AUX1 and AUX2 acoustic signal is drawn from the previous Fader, not fader effect. AUX3 and AUX4 acoustic signal is drawn out from the road after the Fader, Fader by large regulation. The former is marked with Pre, which is marked with the Post.
⑨PAN: It is used to adjust the way the sound source distribution image in space. When the left adjustment is equivalent to the sound source on the left side of the road listening. 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 way the sound source in the middle of listening. In fact, this knob is used to adjust the knob to the left and right sound source distribution, its creation stereo mixer output is extremely important.
⑩ attenuator (Fader): This function key regulation play two roles: on the one hand is used to adjust the way the sound mixing in the mixing ratio, pushed up the proportion of large and small-scale pull-down; on the other hand, is used to adjust The road distance distribution of the sound source, pushed up loud, the equivalent of the road close to the location of the sound source in the sound, pull down, the sound of small, equivalent to the way a sound source in a remote location sound. It is combined with the PAN can create various sound sources space plane distribution. Mixer creation stereo output, using a Fader and PAN function keys.
11Pre-FadeListen: attenuation before the monitor, press it, with headphones plugged into the headphone jack of the console will be able to hear the sound signal before the fader.
12 ON button On: press it, the sound signal access channel mixer for mixing.
13L-R button: press it, sent after the bus left and right channel audio signal path via faders, PAN.
141-2 key: press it, the way the voice signal sent by the after-fader and PAN group busses 1 and 2.
153-4 key: press it, the way the voice signal sent by the after-fader and PAN 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 of unworthiness, causing sound distortion.
Fun from entry to the master mixer
(B) the mixer output section
Arrange mixer output section are the following rules
(1) mixer with a few buses, there must be corresponding outlet.
(2) acoustic signal for each output connector is 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 monitor button, push button next to the general listener to push a button before listening PEL, monitor button next to the knob after knob listen
(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 output or edit the output around the front socket, in general, the corresponding INS (and out again into the 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 section is equipped with headphones and talkback microphone jack TBMic generally bypassed has its volume knob. If you master the laws of more than 6, then the role of the output portion of the function keys on the console will be well aware of.