缩混--eq（the sum of --eq）.doc

缩混--eq（The sum of --eq）Record basic tutorial nine: EQ downmixes(author: Kinghand music angel article from: audio application website)EQ (1)First of all, let's talk about some basic concepts of EQ. EQ is the abbreviation of equalizer. Its basic function is to achieve the purpose of adjusting the tone by gain or attenuation of one or more bands of sound. Of course, EQ also has a significant function, noise reduction. EQ usually includes the following parameters: F (requency), frequency -- this is the point for you to set the parameters of the frequency adjustment used; G (AIN), gain - adjustment parameters for F-measure on the gain or attenuation of set in your Q; (uantize) -- for you to set gain or attenuation band width". It's important to note that the smaller the Q value you set, the wider the band you're dealing with, and the narrower the frequency you're dealing with, the more you set the Q value.We have several common equalizers, one is the simplest, fixed frequency point, fixed Q value of three segments equalizer. This equalizer is often seen on the lower end of the mixer. Mark LOW, MID, and HIGH respectively to represent the frequency bands they are processing. Most of this equalizer is low-end products, in addition to gain, there is no adjustability, but also relatively lack of professional standards. There is also a fixed Q value, fixed frequency points of the multi section equalizer. This equalizer is often used in field reinforcement. Sound field used to compensate the scene. Probably from about 20 sections to 40 sections or so. Again, that is what we are talking about now, the most commonly used in the recording of the value of the equalizer, there are common 3 or 4 paragraph. The equalizer does not have any parameters that are pre-set and need to be adjusted by ourselves.Next, insert a question that everyone asks. That is: do you need to add EQ in the early stage of recording instruments or voices? There have been many discussions on this issue, and everyone's habits are different and their practices will be different. I am here only to show my personal opinion. First of all: no matter what kind of sound we handle, it is for the whole service of music. That is to say, when a song remix is completed, we can really determine what we really want. So, if you're in the pre recorded due to any reason to sound and EQ processing, then the post Mixdown, you have no room for regret. Right?I. noise reductionNow let's talk about the noise reduction function of EQ first. We recorded no matter for what purpose, we will want to get the best sound, but we are in the process of recording, due to unforeseen, often produce all kinds of noise, or we don't want musical overtones. At this point, we can use EQ to achieve the effect of noise reduction. When it comes to this topic, I have to say, I still stick to my usual view, in any case, we should try to strive for the time in the pre recorded, we can get the best sound. Instead of relying on later processing. Because no matter how advanced equipment you use, or how advanced software, the later processing will increase the loss of sound to some extent. Moreover, in the sum of time, we are due to both noise reduction and sound processing, we will be bound by creating downmixes.1. Ultra low frequency noise: this may be due to the fact that our studio is built in noisy downtown or under the studio. For example, a recording studio on the ground floor of Central Conservatory of Music, due to the subway below it, standing in it will often feel very slight vibration. The frequency of this noise is very low and is not within the range of any of our musical frequencies. So we can cut him out with great daring. But, to be sure, this noise is almost beyond the auditory range of the human ear because of its very low frequency,So we are often ignored, in this case, we can discuss to scan the sound spectrum, once found that noise removal, immediately, otherwise, when your music remix is completed, will feel the low-frequency part is very dirty and no efforts. In dealing with such noise, it is possible to use the low cut of the EQ directly. That means filtering out all sounds below a certain frequency point.2, electrical or interference noise: our recording room, most of the power supply will not use, often more than one hundred thousand yuan of high-end voltage regulator equipment. Moreover, when we are recording, there are many devices work at the same time, then it will inevitably lead to interference between the electrical appliances and lead to noise. In fact, a lot of digital low end mixer sounds dirty, and partly because of this reason. This noise can occur in both high frequency and low frequency parts. We can use high pass low pass filtering to eliminate them, of course, the elimination of this noise should be based on the absence of loss of acoustic quality. For example, we can open the low-pass filter, and then gradually increas。