AudioMixing Console (AudioMixingConsole) is a frequently used device in sound reinforcement system and video recording. It has multiple inputs, and each channel's acoustic signal can be processed separately. For example, it can be amplified, made into high, middle and low. In terms of sound quality compensation, it adds charm to the input sound, spatially locates the sound source of the road, etc. It can also mix various sounds and adjust the mixing ratio; it has various outputs (including left and right stereo output, edit output, and mix). Mono output, monitor output, recording output, and various auxiliary outputs, etc.). Among them, the mixer can be divided into an analog mixer and a digital mixer. What are their main functions and differences? Let’s take a look.
Take the example of the 12-channel digital mixer digiMIX24, which is represented by Yihe Technology. Compared with the traditional analog mixer, the advantage is more obvious. It can be set in two modes: 24 x 8 AUX channels, or 24 x 4 AUX channels and 24 x 4 SUB channels, and 6 x DCA fader banks. Users have the flexibility to choose and distribute signals. It is also equipped with a microphone amplifier designed exclusively by ASHLY. The digiMIX24 can be used as the control center of the system throughout the show. The Dante module can also be optionally used to send and receive network audio.
The main function of the digital mixer can be the processing of the audio signal, but the specific processing object is the digital signal that has been sampled, quantized and encoded. These signals include two parts of the audio and control signals, and the digital mixer passes the A wide range of signal processing algorithms, digital control console control circuit and signal processing circuit are all digital, digital audio signals are transmitted through the interface in the form of files (or data streams), such as knobs, switches, faders, etc. The control amount is no longer the actual audio signal of the traditional analog mixer, but the control signal of the digital algorithm. The digital mixer makes the signal processing more flexible, more precise, and the processing flow and effect display are more vivid.
For example, only in the dynamic range parameter comparison, usually after a series of processing, the analog sound system has a dynamic range of about 60 dB, while the internal operation can achieve a dynamic range of 168 to 192 dB on a 32-bit digital mixer. It can be said that the function of a digital mixer is similar to the full functionality of an audio workstation, including hardware structure and software processing. Digital mixer basic structure and module function A digital mixer may vary greatly in appearance. However, the basic components are mainly composed of the following parts. Separately, it looks like a workstation that includes multiple input and output function modules.
(1) I/0 interface, which is equivalent to the input and output signal interface of the analog mixer. Most digital mixers can also use the analog interface card slot to connect analog signal devices. Currently, these analog input ports are used to support The platform seamlessly transitions to full digital, and the types of digital interfaces are AES/EBU, S/PDIF and other standards.
(2) The signal processing part (DSP) is the core of the digital mixing console. It is responsible for various processing and processing of digital signals. It basically determines the function and quality of the entire mixing console.
(3) The console control part, this is the interface of the man-machine dialogue, the appearance is similar to the main body of the analog mixer, but the components are only some faders, knobs, indicators, etc. for control, and they are not passed by themselves. Audio signal, some mixers can also be connected to video display, keyboard, mouse, the user control through software and hardware control effect is the same.
(4) Mixer host (computer control part CPU), combined with software operation, realizes the command execution and signal flow control of the entire mixer.
(5) The power supply section is similar to an analog mixer. A separate external power supply module is generally used.
As a first-generation product, the analog mixer is really inferior in function. The main function of the analog mixer is to process the audio signal. The object is a continuous analog audio signal. In addition to the general amplification, distribution, mixing, and transmission processing, there are the following main functions:
1 level and impedance matching;
2 signal amplification and frequency equalization;
3 dynamic processing;
4 signal distribution and mixing;
5 Create special effects. Sometimes, special handling is required through peripheral auxiliary equipment.
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