Music and vocals: learning to sing
Christine Linklater Voice Release The exercises of this system are aimed at releasing the voice from tension, at developing and strengthening it, primarily as a human tool and as an…

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Trumpet - a musical instrument
The trumpet (Italian tromba, French trompette, German Trompete, English trumpet) is a brass wind instrument of the alto-soprano register, the highest in sound among brass. A natural pipe has been…

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Timbre Correction
Born in the 30s, the equalizer is the oldest and most commonly used sound processing by sound engineers. Today, the market has a wide variety of instruments for timbre correction…

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The principle of work with the equalizer and its application

When working with the equalizer, it is very important to understand that amplification of a frequency band leads to an increase in the overall level of the audio signal, and excessive amplification of the bands can often lead to distortion of the audio signal. In this regard, the weakening of “unnecessary” frequencies often gives a better result than the amplification of the “necessary”. Therefore, the equalizer should be used very carefully and not used if there is no obvious need for it.

Equalizers have a wide range of applications. Their main purpose is to obtain an adequate (linear) sounding of the source material, the frequency response of which may be distorted due to deficiencies in speaker systems, inter-unit processing devices, room parameters, etc.

Often equalizers are used in the lines of stage monitors, the main problem of which is the appearance of the “feedback” effect. In this case, the sound engineer uses a multi-band graphic equalizer to search for the resonant frequency and its attenuation. In addition, using the equalizer, you can limit the frequency range of sound reproduction. However, not all specialists use graphic equalizers to eliminate feedback, since there are special devices for this – digital automatic feedback suppressors, which, in essence, are a parametric equalizer with automatic selection of the resonant frequency, and their filters have a very high Q factor.

When recording or performing, many musicians use various equalizers to get the unique sound of their instruments, as well as special effects associated with the bright highlighting of specific frequency bands. For example, removing with the equalizer all the low and high frequencies, leaving only the middle range, you can get the effect of the “old radio”. Almost all DJs during the sets actively use equalizers on the mixing consoles, again to create certain effects.

Another fundamental application of the equalizer is the frequency correction of sound reproduction of stationary sound amplification systems depending on the acoustic parameters of the room. The frequency response of sound is influenced by many factors: the size and shape of the room, wall coverings, the number of spectators in the room and much more – all this can greatly change the frequency response of the reproduced material. In this case, specialists use three main components: a high-precision measuring microphone, a spectrum analyzer and an equalizer. All this allows him to find out which frequencies “disappear” in this room and which are allocated, and in accordance with this, make a correction.

In recording studios, equalizers in the form of separate devices are used infrequently. This is due to the fact that modern studios are equipped with equipment that practically does not distort the frequency response of the recorded material. However, with digital mixing and mastering, almost all tracks “pass” through the software equalizer, but, as a rule, in order to remove or attenuate unnecessary frequencies that can interfere with the purity of the resulting mix. This is especially true of the voice (vocals), which has a fairly narrow frequency range, as well as some disadvantages that may be associated with articulation and manner of performance.

Musical instruments
Mixing instruments is a real art, and the sound engineer has to turn to the equalizer more than once before he finds the sound he needs. Many instruments have such a powerful and rich sound that it is almost impossible to transmit a close-set microphone. This is where the equalizer comes to the rescue, the main purpose of which is to convey to us this sound in its most natural form.

The transparency of the sound of many instruments can be significantly increased by emphasizing their harmonics. Our ear hears them even in the lowest sounds with a seemingly narrow spectrum. Drums are one of such instruments, the sound brightness of which can be significantly increased by simply reducing the gain in the lower part of the spectrum, thereby emphasizing the harmonics existing in the sound. Here are a few thoughts about what exactly some of the frequencies do with sound and how our ears feel.

Bass: Bass – 50 – 80 Hz, Attack – 700 Hz, Click – 2.5 kHz
Barrel: Bottom – 80 – 100 Hz, Void – 400 Hz, “Point” (click) – 3 – 5 kHz.
Worker: Fat – 120 – 240 Hz, Shock – 900 Hz, Crackle – 5 kHz, Click – 10 kHz.
Violas: Completeness – 240 – 500 Hz, Attack – 5 kHz.
Volume: Completeness – 80 – 120 Hz, Attack – 5 kHz
Hat and cymbals: Sound – 200 Hz, Shine – 8 – 10 kHz.
Electric guitar: Fullness – 240 – 500 Hz, Presence – 1.5 – 2.5 kHz, column 4 × 12: cut off 1 kHz.
Acoustic guitar: Fullness – 80 Hz, “body” of sound – 240 Hz, Present – 2 – 5 kHz.
Organ: Fullness – 80 Hz, “body” of sound – 240 Hz, Present – 2 – 5 kHz.
Piano: Fullness – 80 Hz, Present – 2.5 – 5 kHz.
Brass winds: Fullness – 120 – 240 Hz, Penetration – 5 kHz.

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