The mixing console is also called a tuning console. It amplifies, mixes, distributes, modifies sound quality, and processes sound effects of multiple input signals. It is a system for broadcasting and recording programs in modern radio broadcasting, stage amplification, and audio program production systems. Important equipment. The mixer can be divided into: analog mixer and digital mixer according to the way the signal comes out.
Mixer Mixer has differences in the number of input channels, the number of panel function keys, and output instructions. In fact, to master the use of the mixer, it is necessary to examine it as a whole. Through actual operation and connection, natural practice makes perfect. The mixer is divided into three parts: input part, bus part and output part. The bus part connects the input part and the output part to form the entire mixer.
The microphone input is through the XLR female socket, which can accept balanced or unbalanced low-level signals. Use professional dynamic, capacitive or ribbon low-impedance microphones. If you use unbalanced microphones, use the shortest possible microphone Line to avoid interference from radio noise.
2.LINE: High-level input interfaceHigh-level input is usually sent through TRS 1/4 "Stereo Phone Jack or TRS 1/4" Mono Phone Jack. Signals other than microphone sound sources can be input to the mixer through high level. Stereo Phone Jack input is balanced It is the same as the XLR method, but if you need to use unbalanced equipment, you can use Mono Phone Jack, the wiring can not be too long (less than 4.5m).
Press this key to attenuate the input level by 20 dB. Generally, use this button when the environment noise is high, the device level noise is high or the level is too high. Use this key to attenuate all frequencies of the audio input signal, so as to filter out the noise or electrical noise with low volume. Sometimes there is a phenomenon that the input level signal is too high. If the attenuation is not performed, the control range of the attenuator will be greatly reduced, and it can only slide in a small area, making it difficult to control the volume output control. At this time, press this key to increase the effective control range of the attenuator.
When the Peak light is on, it warns the user that the signal in the input channel is too strong. When it is found that the Peak light is on, and if this situation continues, the mixer will activate the self-protection function and cut off the audio output. Therefore, the input volume should be adjusted at this time, otherwise, the audio output of the mixer will be automatically cut off. Available controls include: Line -20 DB, reducing Gain, pulling down the attenuator, generally it is appropriate to reduce Gain.
5.GAIN: gain knobIt is used to adjust the input signal level. The level at which the input signal is output is determined by the knob and the fader of the input unit. Obviously, the greater the angle of the knob in the clockwise direction and the higher the fader, the greater the increase in the output level of the input signal, or the louder the audio signal of the input channel in the output. The gain range is 20 dB to 60 dB. It is worth noting that if the gain is too high, the channel load will be overloaded and the sound will be distorted; if it is too low, the background noise will be obvious, and it may not be possible to obtain sufficient signal level to provide a mixed output. When using high level input, the gain should be reduced. The gain knob is used as a gateway for sound input to the mixing console. Adjust it properly to ensure that the processing circuit at the next stage of the mixing console can receive a sufficient and "clean" signal.
6. HIGH, MIDDLE, LOW: three-band equalizer knobHigh, Middle, and Low can enhance or attenuate high frequency, middle frequency, and low frequency, respectively, and the control range is plus or minus 15 dB. Intermediate frequency control is especially useful when receiving vocals, which can very accurately modify the performer's voice. Bass: 20 Hz to 500 Hz When appropriate, the bass is relaxed and the sound is full and soft. When the sound is insufficient, the sound is thin, and when it is excessively raised, the sound will be dull, the brightness will be reduced, and the nasal sound will be enhanced.
Midrange: 500 Hz to 2 KHz The sound is clear and bright when appropriate. When the sound is insufficient, the sound is hazy, and when it is over-promoted, it will produce a phone-like sound.
Treble: 2 KHz ~ 8 KHz is the frequency that affects the sound layering. When it is insufficient, the penetration of the sound decreases, and when it is too strong, it will mask the recognition of the syllables of the language, making the tooth sounds accentuated, and the timbre is hairy.
7.MONITOR: The director listens to the volume knobAdjust the volume of the channel in the monitoring line. If you do not use additional director listening equipment connected to the mixer, this knob can be set to 0.
8.EFFECT: output to the effect knob Adjust the knob to determine the level of the output to the effect. If no external effector is used, this knob can be set to 0.
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