The Several Great Tricks of KTV Sound Debugging

- Oct 17, 2018-

Sound pressure level: Simply say that the power of the minimum sound system should be enough, and how much power should be allocated for the large volume of the private room. This is the first guarantee. The sound pressure range of a typical KTV room speaker is between 2.5 and 2.8 meters.

Sound field uniformity: The installation position of the speaker is very important. According to the horizontal and vertical diffusion angle of the speaker, the hanging position of the speaker and the horizontal and vertical rotation pitch angles are arranged to ensure the sound field uniformity in the listening area.

Clarity: Reasonable room design and layout, just the right sound absorption and diffusion is an easy way to ensure the clarity of the sound. If the room uses a lot of glass, mirror and parallel smooth wall, consider adding sound absorption and diffusion measures in the right place. The main method is repeated testing.

Reverberation: including sound reverberation and electroacoustic simulation reverberation, the sound reverberation comes from a mature decoration designer, fully considering the acoustic characteristics of the building in a small space, taking into account the reflection, diffusion, absorption and other indicators of sound. For example, furniture layout, wall design, wallpaper selection, sofa material and other factors, as debugging, we can mainly control electroacoustic reverberation. Traditional karaoke amplifier can only use ECHO to simulate realistic reverberation. Poor, and earlier echo processing chips: M50195, 65831, etc. The frequency response range is too narrow, the effect is poor, and now the mainstream karaoke amplifiers are processed with DSP effects, the frequency response range can reach 24K, which can fully meet the requirements.

Let's talk about the on-site debugging. The first thing is the microphone. Many people use the stage microphone to be used as a private room microphone, but the stage microphone speaks a flat frequency response and a small distortion range, and KTV wants to entertain the public. What is necessary is reasonable distortion, and the frequency response range has special requirements, not 20Hz ~ 20KHz, which is the better performance range of karaoke, mainly highlighting the middle and high frequency bands of vocals, so that the vocal energy is concentrated, achieving clear performance and singing is effortless. The effect, in addition, is that the stage microphone is not suitable for the relatively harsh environment of KTV, it is easy to be bad, including the life of the microphone core and the switch are not long enough, and the use cost is high. Different microphones have different sound characteristics and output levels. For karaoke amplifiers or preamps, the adjustment of the microphone volume (not the total microphone volume, which should be the microphone gain) is especially important. The gain is not enough, and the details of the microphone are not enlarged enough. Singing is laborious, unclear, not full, and the microphone gain is too large, causing the amplifier output to be distorted, causing the bass turbid treble to rupture and easily whistling, which requires the tuner to repeat the test, which is also the most important step.

 

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