How to debug ktv effect device

Debug the reverberation volume of the microphone through MIC ECHO karaoke, adjust the size of this option to suit the feedback volume of the current room, and listen from the outside door. If there is slight echo, it proves that the echo adjustment is correct.

The setting principle of subwoofer channel low cut is to give full play to the ability of subwoofer. Setting it too low is not a wise choice. If it is lower than the resonance frequency point of the subwoofer (the starting point of effective bandwidth), it will not work, but will produce dirty noise. If it is too high above the resonance point of the subwoofer, the precious subwoofer will be sacrificed in vain.

Karaoke pre-equilibrium is a double-edged sword, which may play a very positive role in the adjustment of the system or it may be a bad thing. For the former equilibrium, my opinion is: there is no equilibrium; It is absolutely impossible to rely entirely on equilibrium; The best choice of sound field equalization is the traditional 3 1 segmented graphic equalization; The 7-segment parameter of room balance is enough; The adjustment of equalizer is the most important in the early debugging!

Before, the main channel music debugging mainly included: low cut, high cut, gain, input equalizer, voltage limit, output equalizer and volume.

The main reason why music shows low frequency weakness is insufficient power amplifier or defective low frequency response of speakers. The low-frequency intensity of music depends mainly on the reduction of 100Hz frequency by the system. If the power of the power amplifier is insufficient, it is better to sacrifice the dive depth of the low frequency and move up the low-cut frequency point of the previous music to save the power consumed in the ultra-low frequency band and ensure the power demand in the low frequency band.

If the problem lies in the speaker, there are two situations: first, the speaker system has a low Q value, and the low-frequency dive is good, but the strength is insufficient. In this case, the music balanced 100Hz and its adjacent frequency points can be appropriately increased by the previous level of equalization, such as 80Hz 1db and 100Hz by 2-3db and 65438+.

The "metallic sound" and "noise" in music playback are different. "Noisy" is what people often say that the music is unbearable, mostly caused by the strong reflection of the middle and high frequencies caused by glass or hard decoration, and the frequency is concentrated in the upper part of the middle frequency. Metal sound is a kind of "ear scraping" sound, and the most obvious feeling is that the vocal cords in the played back music are very strong and sharp.

Strong metallic sound is mainly caused by the front stage, power amplifier or speaker itself. If the problem lies in the loudspeaker, the frequency response test can easily find that the sound pressure in the high frequency band (8 kHz- 10 kHz band) is high. In this case, the frequency band with high sound pressure can be appropriately attenuated by the input music equalizer of the previous stage. For example: 6.3KHz- 1db, 8KHz-2db,10khz-0.5db.

Refer to Baidu Encyclopedia entry karaoke effector debugging.