How to connect and debug the audio equipment in the banquet hall and wedding hall?

The connection and debugging of audio equipment in the banquet hall and wedding hall is a comprehensive task. It requires engineers to have certain audio knowledge and skills to ensure sound quality satisfaction and perfect presentation of sound effects at the wedding scene. Here is a detailed step-by-step guide:

1. Device connection

Connection of sound source equipment

Determine the sound source, such as CD player, music player, microphone, etc., and select the appropriate cable to connect it.

For wired connection methods, such as AUX terminals on mobile phones or computers, use the corresponding AUX cable connection.

For CD players or professional players, use RCA terminals, AUX or fiber optic cables to connect.

For wireless connections, such as Bluetooth, ensure that the audio receiver is compatible with the source format and paired correctly.

Connecting the mixing console

The input signal of the mixer is divided into low-impedance microphone signal input and high-impedance line signal input.

Use a TRS stereo connector to connect high-impedance signal sources such as CD, VCD, DVD, etc.

Use XLR Cannon connectors to connect low-impedance signal sources, such as most wired microphones.

As needed, use the mixing console's grouping output, main channel output, AUX output and other functions to transmit audio signals to different audio equipment.

Connection between power amplifier and speaker

Select the right speaker cord to ensure that the cord can withstand the power of the amplifier.

Connect one end of the speaker cable to the output of the amplifier and the other end to the input of the speaker.

Pay attention to polarity, the red port is usually positive and the black port is negative.

Connections to other devices

Properly connect peripheral equipment such as equalizers, voltage limiters, and electronic frequency dividers according to the signal flow.

After ensuring that the connection is correct, turn on all devices and check for abnormal sounds.

2. Equipment debugging

phase check

At low volume, use a phaser to check whether the phase of all slightly is correct one by one.

Ensure that all slightly have the same phase to avoid sound interference and cancellation.

equalizer debugging

Connect the noise generator and equalizer, and use a spectrometer for testing.

In the audio range of 20Hz to 20kHz, adjust each frequency point of the equalizer carefully and minutely.

While maintaining the same volume, the frequency response curve of the room displayed by the spectrometer is basically straight at each test point.

Record the position of each frequency point of the equalizer, and perform debugging and compromise at different volumes.

Debugging of electronic frequency divider

For dividers that only serve as frequency dividers for a bass slightly, let the bass system work alone and adjust the frequency dividers and gain of the bass signal.

For the frequency divider used as a full-frequency system, set it with reference to the frequency dividing point recommended by the slightly manufacturer, and adjust the gain of signals in each frequency band.

Sound pressure level measurement

Measure the sound pressure level at each test point and compare the results.

If the results at each point have a large deviation, it means that the uniformity of the sound field is not good and needs to be analyzed and improved.

Microphone and effect debugging

For wired microphones for human voices and musical instruments, it is necessary to understand the reasonable microphone model and usage distance of each person and instrument when debugging.

For wireless microphones, pay attention to the location of the antenna, dead spots and feedback points when the microphone is used, and the fine-tuning knob for the receiver's signal gain and noise suppression.

When debugging the effector, reasonably set the input and output gains of the signal to ensure a certain margin, and limit the reverberation time and delay amount.

Pressure limiter debugging

The compression start level, compression start time, compression recovery time and compression ratio are set according to the strength of the signal.

When setting the noise gate, select the appropriate threshold level based on the system noise situation.

3. Matters needing attention

Equipment placement

The slightly should be placed on both sides of the front of the venue, aligned with the stage at a 45-degree angle.

Subwoofer can be placed in the center below the stage to enhance low-frequency effects.

tone calibration

Use professional sound testing tools, such as sound analyzers, to calibrate sound quality.

Adjust parameters such as volume, equalization and phase of the slightly to ensure uniform sound effects.

echo test

When debugging the sound source connection, ensure that the sound signal of the sound source equipment is clear and stable and is not disturbed by noise.

Do echo testing well to avoid echo problems.

Volume and effect control

Reasonably adjust the volume of the main audio and auxiliary audio according to the needs of different scenes.

Change the sound characteristics and environmental perception of the audio by adjusting parameters such as reverberation, equalizer and delay effectors.

Audio source switching

When controlling the switching of sound sources, you need to have the ability to respond quickly and make accurate judgments.

Make reasonable volume adjustments and fade-in and fade-out processing on the sound source to ensure smooth switching.

To sum up, the connection and debugging of audio equipment in the banquet hall and wedding hall is a complex and meticulous process. Through reasonable equipment connection, careful debugging steps and compliance with precautions, we can ensure that the sound of the wedding scene is effective.