First, adjust the overall idea of ​​the microphone
Popular and popular singers basically use dynamic microphones, and the speakers should not be covered by the microphone pickup area. The overall direction is to sing the middle and high frequency of the lack of singer, highlighting the brightness of the singer's voice, reducing the low frequency of the bottom gas, avoiding the sound too loud and distorted, the woman adds low-frequency sound, and the man adds high-frequency sound.
Second, need to be familiar with the content before debugging
1 device on and off sequence
Boot sequence: source device (VOD, CD, DVD), audio processing device (effects, equalizer, etc.) to the power amplifier to the TV, projector. When the shutdown is reversed, the amplifier should be turned off first. This operation can prevent the impact of the device from being turned on and off, and prevent the amplifier and the speaker from being burnt.
2 debugging
1. The volume of the amplifier (microphone, music) potentiometer is adjusted to the appropriate position;
The sound quality compensation knobs are placed in the middle position.
Try the sensitivity and dynamic performance of the microphone first, then add the reverb and accompaniment music to sing. The song will be reverberated and should be more rounded, fuller and more layered than the original song.
Test accompaniment music: the volume of the accompaniment music to normal work; but pay attention to the volume is moderately pleasing, too loud and easy to make people tired and unbearable. (When tuning, you should listen to the effect in different positions. For example, stereo sound, sound quality, etc. The songs placed should be familiar songs). The requirements for the effect of music should be strong and aesthetic, the treble can not be harsh, the bass can not be turbid, the song is required to be clear, such as the voice of the female voice is clear and audible. But not too heavy.
5. Note that in the official singing, the original singing sound is eliminated.
Third, note when tuning:
1 When tuning, you should monitor the left and right channels separately. It should be familiar with the relationship between monitor sounds and live sounds, relying heavily on personal hearing.
2 Beautify the song with reverberation. For non-professional singers, the reverberation should be appropriately increased to cover up the noise and vocal defects.
3 When the volume is low, pay attention to raising the low frequency and high frequency; when the volume is large, increase the intermediate frequency appropriately to enhance the brightness of the sound.
4 tuning is based on singing. Before the song appeared, gradually lower the accompaniment to highlight the song.
5 For disco or rock music, be careful not to squeak the compensation button when lifting the bass to avoid damage to the amplifier and speakers due to excessive power output.
6 If the acoustic feedback whistling sound occurs, you should quickly reduce the total volume of the microphone (or fine-tune the knob) to remove the howling, find out the cause and then gradually increase
Fourth, the human voice color debugging considerations
u Voice is a compound sound. It is composed of the pitch of the sound and a series of overtones. These overtones are the number of bits of the pitch frequency, the physics is called the partial sound, the electroacoustic is called the harmonic, and the music is called the overtone. The amplitude of the low frequency overtone is strong, the tone is mixed and thick; the amplitude of the intermediate frequency overtone is relatively strong, the tone is round, natural and harmonious; the amplitude of the high frequency overtone is relatively strong, and the tone is bright, clear and analytical. Strong.
â—† If the high frequency band is too weak, its tone will become dull, lacking in charm, and personality; if the high frequency band is too strong, the tone will become noisy and harsh. If the frequency in the middle and high frequency bands is too weak, the tone will become dim and sturdy; if the frequency in the middle and high frequency bands is too strong, the tone will become dull.
â—† If the frequency of the low band is too weak, the tone will become thin and pale; if the frequency of the low band is too strong, the tone will become cloudy.
5. Adjustment of reverberation time in KTV room
Reverb usually determines the length of the reverberation and has a direct impact on the color and clarity of the sound. In general:
1 When the bass is sung, the reverberation time can be shortened to improve the clarity of the sound; if the soprano is singing, the reverberation time can be extended appropriately to increase the color of the sound.
2 For the singing place, if the wall around the room is made of wood material, then it has a certain reverberation effect, then the reverberation time should be reduced to avoid the sound blur; otherwise, if the room is Glass structure, or sound-absorbing materials such as flannel curtains, such a room lacks reverberation, the reverberation time should be increased to avoid dryness.
3 The number of live audiences also has a great impact, because the audience's clothing also has a great absorption of sound. In general, the tuner can choose a suitable reverberation time in 1-2 seconds.
4 Usually the reverberation time is between 0.7 and 1.2ms. The easy way is to clap in the room and feel the reverberation of the sound in the room. If the resonance is moderate, it means that the reverberation time of the room is appropriate.
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