KTV audio debugging several tricks

KTV debugging should combine theory and practice. If there is no theoretical guidance and blind debugging, the effect will not be so good.

KTV sound reinforcement must ensure several basic factors: sound pressure level, sound field uniformity, clarity, and reverberation. It is necessary to understand some basic electro-acoustic knowledge of equipment.

Sound pressure level: To put it simply, at least the power of the sound system must be sufficient, and the volume of the private room should be matched with the power. This is the first thing to ensure.

Generally, the best sound pressure range of speakers in private KTV rooms is between 2.5 and 2.8 meters. That is to say, you'd better make the distance between the hanging position of the speakers and the sofa singing area close to this. If you don't believe me, you can test it. Move the microphone slowly from the sofa to the speaker position to see if it is the best singing effect in this distance range.

Sound field uniformity: The installation position of the speakers is very important. Reasonably arrange the hanging positions of the speakers according to the horizontal and vertical diffusion angles of the speakers, as well as the horizontal and vertical rotation and pitch angles, to ensure that the sound field in the listening area is uniform.

Clarity: Reasonable room design and layout, proper sound absorption and diffusion are simple ways to ensure the clarity of sound reinforcement. If the room uses a lot of glass, mirrors and parallel smooth walls, it is necessary to consider adding sound absorption and diffusion measures at appropriate positions .

The main method is repeated testing. If the room already has a lot of sound-absorbing materials and cannot be removed, you can refer to the frequency division design of the existing speakers to modify the speakers, such as increasing the number of tweeters. It is recommended to use 2.5"The high-pitched high-pitched unit can make up for the excessively absorbed high-pitched part and increase the clarity of the high-pitched sound; too much low-frequency will also affect the clarity of the room. If you try to attenuate the tone part a lot, it will cause signal distortion. If it is too much, you can try a crooked trick. Try: Spraying self-painting on the woofer unit often needs to be sprayed several times. Let’s analyze the specific situation in detail, so that the characteristics of the woofer cone are changed, and it is biased towards the mid-frequency. Haha, try it again. The bass is also related to the installation position of the speaker. It is also a way to adjust the position of the speaker to find an optimal balance point.

Reverberation: including building-acoustic reverberation and electro-acoustic analog reverberation. Building-acoustic reverberation comes from a mature decoration designer, fully considering the architectural acoustic characteristics in a small space, taking into account the reflection, diffusion, absorption and other indicators of sound , such as furniture layout, wall design, wallpaper selection, sofa material and other factors, as debugging we can mainly control the electro-acoustic reverberation, the traditional karaoke amplifier can only simply use ECHO (echo) to simulate the real reverberation , the effect is poor, and the earlier echo processing chips: M50195, 65831, etc. have a narrow frequency response range and poor effect. Now mainstream karaoke power amplifiers use DSP effect processing, and the frequency response range can reach 24K, which can fully meet the requirements. .