Audio peripheral processor: effector, feedback suppressor, is it necessary?

Many people build sound systems, and they are always promoted by businesses for all kinds of audio peripherals. Effector and feedback suppressor sound powerful. Do all systems have to be equipped? In fact, in many ordinary scenes, blind installation will destroy the sound quality. Today, I will explain the two devices thoroughly, and I will know whether your system needs to be added or not after reading them.
First, understand what the two devices are doing.
Effector: responsible for beautifying the sound.
The core task of the effector is
Decorate timbre and create a sense of space
. Common functions: reverberation, delay, equalization, compression and noise reduction.
Singing scene: increase reverberation, cover up human voice defects, and make the voice full and moist.
Sound reinforcement of musical instruments: superposition of delay and chorus effect enriches the timbre of musical instruments.
Meeting scene: moderately balanced, making people's tone clearer and more transparent.
Note: At present, many digital mixers and front-end integrated machines have built-in effectors, so it is not necessary to buy independent hardware effectors.
Feedback suppressor: specially designed to deal with howling
Howling is that the microphone picks up the sound from the speaker, forming a sound cycle and erupting into a shrill high-frequency scream. The feedback suppressor will scan the audio signal in real time, automatically catch the frequency point of howling, and attenuate the frequency point with an extremely narrow notch filter to prevent howling, and at the same time, it can increase the available volume of the microphone and protect the tweeter of the speaker from being burned out.
Key distinction:
The effector tube "sounds good"; The feedback suppressor tube "can't scream", the positioning of the two is completely different and can't replace each other.
Second, what circumstances, it is recommended to install?
Suggested upper effector
K songs and small-scale performances need human voice to polish and pursue a sense of singing atmosphere.
Using a pure analog mixer, the reverberation effect of the machine is very poor, and the voice is hard and unpleasant.
Sound reinforcement of musical instruments requires timbre processing such as delay and chorus.
If your digital mixer comes with good reverberation and balance, you don't need to add additional independent effects.
Suggested upper feedback suppressor
Meeting room, lecture hall, classroom, multiple desktop microphones and microphones are turned on at the same time, which makes it easy to scream.
Mobile performance, the venue is often changed, the microphone position is constantly changing, and the whistling frequency is not fixed.
A voice reinforcement scene that requires the microphone to be turned up at a high volume and can't scream.
Feedback suppressors are preferred for
Speech reinforcement
The first goal is to hear clearly.
Third, which scenes, don't add.
It is not recommended to install independent feedback suppressor in home KTV.
When the feedback suppressor removes the howling frequency, it will lose some high notes, and singing will make people feel stuffy and lack of transparency. When a household K song encounters howling, it is only necessary to adjust the microphone placement, reduce the gain, and make good use of the simple anti-howling function of the effector, instead of using the independent feedback suppressor.
Simple background music system, only playing music, without microphone input, neither effector nor feedback suppressor is needed. Adding it will only increase the signal link and introduce noise floor.
Small live broadcast, microphones directly connected to the mixer, 12 microphones used well, and the mixer comes with balance, which is completely enough. Overlapping peripheral devices will only increase debugging complexity.
Four, easy to step on the pit of two misunderstandings
Myth 1: With the feedback suppressor installed, the microphone can be used in the speaker.
Feedback suppressor is not a panacea. The microphone is facing the speaker, and the sound feedback is too strong, even if the suppressor can't completely save it, it will still scream. Equipment is all-in-one insurance, which cannot replace reasonable equipment layout.
Myth 2: The louder the effector is turned on, the better the sound will be.
The reverberation is too loud, the voice is cloudy and weak, and the lyrics are not clear. There is almost no reverberation in the conference speech; K songs are moderately opened; The performance is fine-tuned according to the live space.
Five, signal link tips (wiring sequence)
Standard flow: microphone input → feedback suppressor → effector → mixer → power amplifier → speaker.
Suppress howling first, then beautify the timbre.
The order is reversed, and the effect of preventing howling is greatly reduced.

Six, quick decision table, directly control your scene.