College】 【weak regulation on the graphic equalizer.

<br> the role of graphic equalizer one that I think we all understand, in other words, it is the most intuitive device, where you improve where attenuation, to see at a glance, does look very simple. .<BR> But it's really playing well balanced, it is not so simple things, and play well balanced, a tuner is something elegant. .The main function of <BR> equalizer, based on experience it is divided into three parts, the first is used to handle some of the deficiencies in the sound field, and the second is used for the modification of sound, and the third is a positive feedback to the microphone .whistle some suppression. .Among them, the first and third points, are technology-based problems, could use some test equipment or software to do some debugging with reference to the second point input artistic problem that requires sophisticated tuner for music and sound understanding of .. .<BR> Start with the first point, the equalizer on the sound field processing. .A sound system is not just that we usually talk about the audio equipment, mixer, peripherals, power amplifier and speaker combination consisting of PA equipment, sound reinforcement system also includes a sound reinforcement equipment, the environment faced by the PA. .PA sound reinforcement system that is composed of equipment and sound reinforcement environments together. .In this system, the equalizer to play an important role, its role and its name to be used to this system, the human ear can hear the sound energy in various frequency bands to be balanced to ensure the sound reinforcement system .provided on the source audio signal can faithfully restored. .Because the different sound reinforcement environments, speakers because the sound will be produced changes in the environment changes, and this change is mainly reflected in because of reflection, phase, and so the impact of factors on the acoustic wave, resulting in offset or stack, etc., cause system .transmission characteristics curves, therefore, need to change to the number of speakers necessary adjustments to equipment, bringing the PA equipment, sound reinforcement in this environment, the performance characteristics of the source or increase Bu Zhiyu missing something, so as to ensure .Audio sound reinforcement equipment to restore the integrity and authenticity of the signal. .To achieve this, not simply increase or decrease depend on certain frequency equalizer can be resolved, like a similar system, if there is such a phase comb filter interference generated if the peak in some frequency bands (since the superposition .some things) or trough (as offset by something less), simply corresponds to the attenuation equalizer can not achieve to solve or improve the purpose of asking this is because due to the phase problem caused. .If everyone in the use of test systems to correct the frequency response curve of the equalizer, when found to make substantial amendments to some of the balanced production peaks or troughs of the bands you can get some not correspond to the increase or decrease the amount of change in balance of the change (for example, .You raised a band of 10 dB, but only to reflect on the spectrum analyzer to enhance the case of 2-3 dB), it is generally because of the presence of phase interference. .You need to solve the problem of phase interference, rather than to deal directly depend on balance. .If you rely on a balanced approach at this time, often due to a substantial increase or decrease some of the band into the speaker caused a significant increase in electrical power or attenuation of the signal system for the future security or have some hidden sound distortion. .<BR> Second, the modification on the balance of sound, looks like this is relatively simple, not that add or enhance what the point of what high school bass. .This point of view yes, but you add or upgrade What is the source of these bands? .Sometimes the modification of the balance of sound is called "do voices", as if vegetables were seasoned chefs, like what kind of guests for what kind of flavor transfer. .Or that the taste of this thing is not the normal taste, how to have it on a normal taste. .In this respect, the main consideration is that if used correctly balanced the reduction in music, in the last one, a balanced regulation generally use the standard pink noise signal source. .But the pink noise signal is a relatively stable, it can not be transient performance of the music changes and details of the jump. .The reduction of musical elements, you need sophisticated understanding of music tuner, this method is that there is a saying: the music itself is a manifestation of harmony, and balance itself is a harmonious expression. .When using this device so that the equalizer performance of musical harmony to return to the essence, the entire system will send a harmonious sound. .We usually feel a PA system if you do not sound good, some sense can be said that the system issued a discordant voice. .So we have to use EQ to create a harmonious sound equipment to allow the system to achieve harmony. .<BR> Third, the equalizer control of the whistle, this is often a lot of friends on the balanced role of the most direct and most common understanding. .Why put it on the last point, its ideas from the previous two points. .In fact, after the completion of the work of the previous two, when the whole issue of harmonious sound system, in the sound reinforcement system, unless some very special reasons, the microphone of the whistle has changed little chance, and only in some very special .conditions, such as the microphone from the speaker it is too close, will have relatively large potential whistle. .The whistle is not a microphone What equipment can be used completely eliminated, it is just that in a certain range it can be some improvement, so we do not want to send a great hope lies with the complete elimination of the microphone equalizer whistle, for example, in the .a band, microphone whistle, and you put this band attenuation of 6 dB, it is not called, then you raise the microphone by 6 dB or less, it will not call, if more than 6 dB increase, it still .continue to have a whistle. .And the 6 dB increase, that is, the gain equalizer on the contribution of sound transmission, and it means you do not whistle in the case of the microphone, the microphone's volume increased by nearly 4 times. .<BR> Therefore, the equalizer play, usually play through the three steps above, first aid equipment, to see what system defects, if flawed, first, do not rush to move a balanced, but the first analysis of this defect .causes, after a good deal, and then listen to the system where harmony is not enough, and finally connected to the microphone to see if there is no whistle. .When you play with balance, you can try to carry out in accordance with the above statement, do not hurry to hold a microphone up to walk around to go first whistle points. .<BR> <BR>.