CN107509156B

CN107509156B - Tuning system

Info

Publication number: CN107509156B
Application number: CN201710911725.XA
Authority: CN
Inventors: 周文胜
Original assignee: FOSHAN ZEBOND TECHNOLOGY CO LTD
Current assignee: FOSHAN ZEBOND TECHNOLOGY CO LTD
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2023-08-18
Anticipated expiration: 2037-09-29
Also published as: CN107509156A

Abstract

The utility model provides a tuning system, and belongs to the field of tuning of sound systems. The sound tuning system comprises a sound tuning device with an audio analysis recording function, a sound tuning computer, a white noise signal generator, an audio processor, a power amplifier and more than 1 sound boxes connected with the power amplifier, wherein the sound tuning device with the audio analysis recording function comprises a device body, an audio acquisition module, a signal amplification module, a signal conversion module, a DSP processor and a data storage module which are arranged in the device body, the output end of the audio acquisition module is connected with the input end of the signal amplification module, the output end of the signal amplification module is connected with the input end of the signal conversion module, and the output end of the signal conversion module is respectively connected with the data storage module and the DSP processor. The utility model greatly shortens the debugging time of the sound equipment and reduces the difficulty and workload of debugging the sound equipment; the special tuning operator is not needed to participate in tuning, so that tuning cost is greatly reduced.

Description

Tuning system

Technical Field

The utility model relates to the field of sound system tuning, in particular to a sound tuning device with an audio analysis recording function, and further relates to a tuning system comprising the sound tuning device and a tuning method.

Background

The installation of equipment and tuning of professional sound systems are indispensable important links. Because the sound box (loudspeaker) cannot achieve the perfect frequency response characteristics (material factors, cost factors, sound box structural factors and the like), the environment for installing the sound equipment cannot be the ideal acoustic environment, such as too large space, too small space or too strong wall reflection, or special acoustic effect requirements of a main seat and the like, professional audio processors are required to be added to achieve the ideal sound effect, the current very common audio processor brands are also many, such as XTA, DBS and the like, and various domestic audio processors are also provided, and the current processor products are all provided with USB interfaces and can be connected with computers, so that the special tuning software of the computers is very convenient to use and adjust the functions of the processor.

However, in practical application, many sound systems have an unsatisfactory use environment, a professional tuning operator needs to know about the scene and the music performance of the sound, and by using own experience and professional sound tuning knowledge, various parameters of an audio processor are adjusted through tuning tool software in a tuning computer, and the workload is very large; the cost of debugging the audio equipment is not very high, thousands of times are small (such as debugging the audio equipment of a KTV room), tens of thousands of times are large (such as debugging the audio of a large-scale performance or a television station variety program, and the cost of a tuning person is tens of thousands).

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides an acoustic tuning device with an audio analysis recording function, a tuning system comprising the acoustic tuning device and a tuning method based on the tuning system.

The utility model relates to an acoustic tuning device with an audio analysis recording function, which comprises a device body, an audio acquisition module, a signal amplification module, a signal conversion module, a DSP processor and a data storage module, wherein the audio acquisition module, the signal amplification module, the signal conversion module, the DSP processor and the data storage module are arranged in the device body, the output end of the audio acquisition module is connected with the input end of the signal amplification module, the output end of the signal amplification module is connected with the input end of the signal conversion module, and the output end of the signal conversion module is respectively connected with the data storage module and the DSP processor.

The utility model is further improved, the device body is provided with a starting button and a USB interface, and the starting button and the USB interface are respectively connected with the DSP processor.

The utility model further improves, and the sound tuning device is a microphone.

The utility model also provides a tuning system comprising the sound tuning device, which comprises a tuning computer, a white noise signal generator, an audio processor, a power amplifier and more than 1 sound boxes connected with the power amplifier, wherein the sound tuning device is connected with the tuning computer, the input end of the power amplifier is connected with the output end of the white noise signal generator through the audio processor, the audio processor is respectively connected with the tuning computer and the white noise signal generator, the sound tuning device can collect audio signals sent by the sound boxes and send the audio signals to the tuning computer, the tuning computer converts and analyzes the audio signals to obtain audio parameters, and the audio parameters are stored in the sound tuning device.

According to the utility model, a starting key and a USB interface are arranged on the device body of the sound tuning device, the starting key can trigger the sound tuning device to send a control signal through a tuning computer and an audio processor, a white noise signal generator is started, and the sound tuning device is connected with the tuning computer through the USB interface.

When the number of the sound boxes is more than 2, the sound box tuning device controls the white noise signal generator to sound through each sound box independently, the sound box tuning device collects audio signals sent by each sound box, sends the audio signals to the tuning computer to be converted and analyzed into audio parameters, and then the audio parameters of each sound box are stored in the data storage module of the sound box tuning device respectively.

The utility model also provides a tuning method based on the tuning system, which comprises the following steps:

s1: the professional tuning person tunes a set of sound system to the optimal sound effect to obtain the optimal audio parameters;

s2: placing a sound tuning device at a tuning position of a professional tuning operator, and sending a test instruction to a white noise signal generator;

s3: the white noise signal generator emits a white noise signal, and then sounds through the audio processor, the power amplifier and the sound box;

s4: the tuning computer sends a recording instruction to the sound tuning device, the sound tuning device starts to collect audio signals sent by the sound box, and the optimal audio parameters are stored in the sound tuning device;

s5: the user connects the sound tuning device with sound equipment to be tuned, and executes the steps S2-S4 to acquire and store the audio parameters of each sound box in the sound equipment to be tuned;

s6: the tuning computer obtains the audio parameters of each sound box through the sound tuning device, and analyzes and adjusts the audio parameters of each channel by referring to the optimal audio parameters obtained in the step S4.

In step S2, the sound tuning device sends a test instruction to the tuning computer, the tuning computer sends the test instruction to the audio processor, and the audio processor sends the test instruction to the white noise signal generator to start the white noise signal generator.

The utility model is further improved in that in step S4 and step S5 the audio parameters comprise spectral curves, delay values and phase states.

In step S3, each output channel of the white noise signal sounds separately in turn, and the audio parameters corresponding to each output channel are collected respectively.

Compared with the prior art, the utility model has the beneficial effects that: the debugging time of the sound equipment is greatly shortened, and the difficulty and the workload of debugging the sound equipment are reduced; the special tuning operator is not needed to participate in tuning, so that tuning cost is greatly reduced; the method is very beneficial to the field installation and debugging of professional sound equipment and automobile sound equipment, and truly realizes the carry-on of tuning master.

Drawings

FIG. 1 is a schematic diagram of an acoustic tuning device according to the present utility model;

FIG. 2 is a schematic diagram of a tuning system;

FIG. 3 is a schematic diagram of the optimal audio parameters after the professional disc-jockey has toned;

fig. 4 is a schematic diagram of a sound field of a tuning-equipped acoustic device collected by an acoustic tuning device;

fig. 5 is a schematic diagram of audio parameters of the tuned audio device.

Detailed Description

The utility model will be described in further detail with reference to the drawings and examples.

As shown in fig. 1, the sound tuning device with the audio analysis recording function comprises a device body, an audio acquisition module, a signal amplification module, a signal conversion module, a DSP processor and a data storage module, wherein the audio acquisition module, the signal amplification module, the signal conversion module, the DSP processor and the data storage module are arranged in the device body, the output end of the audio acquisition module is connected with the input end of the signal amplification module, the output end of the signal amplification module is connected with the input end of the signal conversion module, and the output end of the signal conversion module is respectively connected with the data storage module and the DSP processor. The signal conversion module in this example is an ADC analog-to-digital conversion module.

In addition, in order to be convenient for stereo set tuning device and external equipment communication, be equipped with start button and USB interface on the device body, start button, USB interface respectively with DSP treater link to each other.

The utility model is especially suitable for the tuning of sound equipment with a small size and convenient carrying, which is characterized in that the actual tuning environment such as a car, a KTV room, a meeting room and the like is not too large in distinction from the environment needing to be restored, and the sound tuning device is preferably a microphone.

As shown in fig. 2, the utility model further provides a tuning system comprising the sound tuning device, which comprises a tuning computer 5, a white noise signal generator 7, an audio processor 6, a power amplifier 4 and 2 sound boxes 2 and 3 connected with the power amplifier 4, wherein the sound tuning device in this example is a microphone 1, the microphone 1 is connected with the tuning computer 5 through a USB interface, the input end of the power amplifier 4 is connected with the output end of the white noise signal generator 7 through the audio processor 6, the audio processor 6 is respectively connected with the tuning computer 5 and the white noise signal generator 7, the microphone 1 can collect sounds emitted by the sound boxes 2 and 3, and a tuning tool is configured in the tuning computer 5 in this example.

The white noise signal generator is selected because the power (amplitude) of the white noise in each frequency band is the same, the white noise is a nearly flat line from the perspective of frequency domain (frequency spectrum), and the white noise is an ideal reference signal for testing the frequency spectrum from the perspective of frequency. White noise refers to noise in which the power spectral density is evenly distributed throughout the frequency domain. Random noise, where all frequencies have the same energy density, is called white noise.

The device body of the microphone 1 of this example is equipped with start button and USB interface, start button can trigger microphone 1 sends test command to tuning computer 5, and tuning computer 5 sends test command to audio processor 6, and audio processor 6 sends test command to white noise signal generator 7 again, starts white noise signal generator 7.

The number of the sound boxes 2 in this example may be 1 or more, and when the number of the sound boxes is more than 2, the microphone 1 controls the white noise signal generator 7 to sound independently through each sound box, and the specific processing procedure is as follows:

the microphone 1 collects audio signals sent by the loudspeaker boxes, converts the audio signals into PCM signals, sends the PCM signals to a tuning tool in the tuning computer 5 for processing, carries out FFT operation on the audio signals sent by the output channels by the tuning tool, obtains the frequency spectrum of white noise signals, calculates delay parameters and phase parameters, switches to the next channel for sounding after obtaining more than one output channel, and stores the audio parameters in a data storage module of the microphone 1 until the audio parameters of each loudspeaker box are collected.

The audio parameters stored by the data storage module of this example include a spectrum (EQ) curve, a delay (delay) value, and a phase (phase) state. By adjusting these parameters of the audio processor, the sound of the loudspeaker box is optimized.

The EQ is used for compensating some frequency response defects of the loudspeaker or attenuating and eliminating some dissonance frequencies, and parameters of the EQ comprise frequency, Q value and gain. In addition, the hearing effect of the sound can be effectively improved by improving and attenuating different frequency points, for example, the gain of the EQ of 250Hz is improved, the sound can be more plump and round, and the problems of dry hearing and thinness of the sound can be solved by properly adjusting the frequency points.

The delay is to adjust the sound synchronization of each of the plurality of sound boxes, and since the transmission speed of sound in the air is about 346 m/s, the distance between the loudspeaker and the listener is important to calculate, if the first sound box 2 is 10 m away from the listener and the second sound box 3 is 6 m away from the listener, the audio frequency of the second sound box 3 must be compensated for 4 m, that is, the audio frequency sent to the second sound box 3 must be delayed for 4/346=11 mS, so as to ensure that the listening effect of the listener is optimal.

In the construction process, if the horn wire is connected reversely, two horns output opposite-phase audio signals, sounds can cancel each other, and the sound effect is seriously deteriorated. The audio processor can also input the inverted audio to the inverted speaker, thereby correcting the degradation of the audio effect caused by improper installation.

As shown in fig. 3-5, the utility model further provides a tuning method based on the tuning system, which comprises the following steps:

s1: the professional tuning operator tunes a set of sound system to the optimal sound effect at the appointed place, and the EQ curve, the delay, the phase and the like are set through the tuning computer, so that the optimal audio parameters are obtained.

As shown in fig. 3, in this example, 31 segments of EQ are set in the spectrum curve, where parameters that can be set in each segment of EQ include a frequency point where the EQ is located, a gain, a Q value, and the like, an X-axis of an icon in fig. 3 represents a frequency, a Y-axis represents a gain, a total of 31 segments of EQ can be set, a frequency point of the segment EQ can be set by selecting one segment to shift left and right, and a gain of the segment EQ can be set by shifting up and down to realize increase and attenuation.

The automobile sound is debugged in the example, the automobile owner naturally hopes that the sound effect of the driver position is optimal, but in physical terms, each sound box (the left front, the right front, the left surrounding, the right surrounding, the middle and heavy bass 6 output channels are arranged in the automobile, and if the sound box is provided with 4 output channels, the middle and heavy bass are not arranged in the automobile), and the distance from the sound box to the driver position is different, so that the sound is actually perceived as disordered and asynchronous, the optimal effect is that the time from all sound boxes to the driver position is the same, the effect is obviously enhanced, and the time difference caused by different distances of different sound boxes can be compensated by adjusting the time delay.

Regarding the phase setting: the phase is the sound box, when the red port of the sound box is connected with the positive voltage and the black port is connected with the negative voltage, the cone surface moves outwards, which is commonly called positive connection, and attention must be paid to the port connection polarity of the two sound boxes when the stereo is enjoyed. Therefore, the phase setting is also required in this example.

S2: and placing an acoustic tuning device at the tuning position of the professional tuning operator, sending a test instruction to a tuning computer by the acoustic tuning device, sending the test instruction to an audio processor by the tuning computer, sending the test instruction to a white noise signal generator by the audio processor, and starting the white noise signal generator.

S3: the white noise signal generator emits a white noise signal, and then sounds through the audio processor, the power amplifier and the sound box; the white noise signal emitted by the loudspeaker box is not emitted simultaneously by all the output channels, but each channel is independently emitted, and the frequency response, delay and phase parameters of each output channel are tested in turn.

S4: the tuning computer simultaneously sends a recording instruction to the sound tuning device, and the sound tuning device starts to collect audio signals sent by the sound box and stores the optimal audio parameters in the sound tuning device.

As shown in fig. 4, the microphone 1 collects the audio signal sent by the sound box 2 or 3, converts the audio signal into a PCM (pulse code modulation) signal through the ADC analog-to-digital conversion module, and then sends the PCM signal to tuning tool software of the tuning computer through the USB interface for processing. The tuning tool software performs FFT (Fast Fourier Transformation, i.e., fast fourier transform) operation on the audio signal sent from the output channel, and obtains the spectrum of the white noise signal, as shown in fig. 4, where the X-coordinate represents the frequency, and the Y-axis represents the signal amplitude or gain on the frequency point. Delay parameters and phase parameters are then calculated. After more than one output channel parameter is obtained, the voice of the next channel is switched to continue to be collected, so that all output channels are collected circularly, at the moment, if the written data on the PC tuning software is clicked, the EQ curves of all output channels are written into the data storage module of the microphone, and delay and phase data are written into the data storage module of the microphone, so that the microphone records the parameters of all output channels.

S5: and (3) connecting the sound tuning device with sound equipment to be tuned by a user, and executing the steps S2-S4 to acquire the audio parameters of each sound box in the sound equipment to be tested.

S6: the tuning computer obtains the audio parameters of each channel through the sound tuning device, and adjusts the audio parameters of each channel by referring to the optimal audio parameters obtained in the step S4.

As shown in FIG. 5, after the user takes the microphone, the microphone is connected with the tuning computer, the microphone with the parameters recorded thereon is placed at the position where the best effect is required to be set, the process in steps S2-S4 is repeated, at this time, the microphone 1 collects the EQ curve of each output channel in the current user environment, and uploads the EQ curve to the tuning computer, so that tuning tool software compensates and restores 31 EQ sections by comparing the EQ curve which is set by the original tuning user and stored in the microphone (the curve is read by a tuning tool on the tuning computer after the microphone is connected with the tuning computer), insufficient compensation and too much attenuation are achieved, the compensation and attenuation of this example are achieved by setting the gain of 31 EQ sections in the audio processor, and finally the achieved sound field effect is that the EQ curve collected by the user on site is basically coincident with the EQ curve originally stored in the microphone, so that the reduction of the audio parameters such as the EQ curve is achieved, and the best sound field effect is obtained.

The utility model greatly shortens the debugging time of the sound equipment and reduces the difficulty and workload of debugging the sound equipment; the special tuning operator is not needed to participate in tuning, so that tuning cost is greatly reduced; the method is very beneficial to the field installation and debugging of professional sound equipment and automobile sound equipment, and truly realizes the carry-on of tuning master.

The above embodiments are preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model, which includes but is not limited to the embodiments, and equivalent modifications according to the present utility model are within the scope of the present utility model.

Claims

1. A tuning system, characterized by: the tuning system comprises a sound tuning device with an audio analysis recording function, a tuning computer, a white noise signal generator, an audio processor, a power amplifier and more than 1 sound boxes connected with the power amplifier, wherein the tuning method of the tuning system comprises the following steps:

2. The tuning system of claim 1, wherein: the device body of the sound tuning device is provided with a starting button and a USB interface, the starting button can trigger the sound tuning device to send control signals through a tuning computer and an audio processor, a white noise signal generator is started, and the sound tuning device is connected with the tuning computer through the USB interface.

3. The tuning system of claim 1, wherein: the sound tuning device is a microphone.

4. The tuning system of claim 1, wherein: when the number of the sound boxes is more than 2, the sound box tuning device controls the white noise signal generator to sound independently through each sound box, the sound box tuning device collects audio signals sent by each sound box, sends the audio signals to the tuning computer to be converted and analyzed into audio parameters, and then the audio parameters of each sound box are stored in the data storage module of the sound box tuning device respectively.

5. A tuning system as claimed in any one of claims 1 to 4, wherein: in step S2, the sound tuning device sends a test instruction to the tuning computer, the tuning computer sends the test instruction to the audio processor, the audio processor sends the test instruction to the white noise signal generator, and the white noise signal generator is started.

6. A tuning system as claimed in any one of claims 1 to 4, wherein: in step S4 and step S5, the audio parameters include a spectral curve, a delay value and a phase state.

7. The tuning system of claim 6, wherein: in step S3, each output channel of the white noise signal sounds separately in turn, and the audio parameters corresponding to each output channel are collected respectively.