CN218826209U

CN218826209U - Digital sound console recording system

Info

Publication number: CN218826209U
Application number: CN202222095141.9U
Authority: CN
Inventors: 闵聪
Original assignee: Dongguan Jingheng Electronic Co ltd
Current assignee: Dongguan Jingheng Electronic Co ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2023-04-07
Anticipated expiration: 2032-08-10

Abstract

The utility model discloses a digital sound console recording system, include: the analog filter unit is used for receiving the two paths of analog signals output by the digital sound console and outputting two paths of primary filtering signals; the pre-filter unit is used for receiving the primary filtering signals of the two paths and outputting secondary filtering signals of the two paths; the analog-to-digital converter unit is used for receiving the two paths of secondary filtering signals and converting the two paths of secondary filtering signals into two paths of digital signals; the audio processing unit is used for receiving the two paths of digital signals and storing the digital signals as digital format files; and the USB interface unit is used for receiving the digital format file and transmitting the digital format file to the USB flash disk. The utility model has the advantages that: and the two paths of analog signals output by the digital sound console are sequentially input into the analog filter unit, the pre-filter unit, the analog-to-digital converter unit and the audio processing unit, and the recorded sound is directly stored in the USB flash disk after data processing, so that the system reliability is high.

Description

Digital sound console recording system

Technical Field

The utility model relates to a digital sound console technical field especially relates to a digital sound console recording system.

Background

Digital mixing consoles are a frequently used device in public address systems and audio-visual recordings, with multiple inputs, each path of sound signal being processed separately. The existing digital sound console can only be connected with a PC end through a network cable and a router, so that data backup is carried out on a currently output recording file, and recording cannot be finished if any one of the network cable, the router or the PC on a recording site fails.

SUMMERY OF THE UTILITY MODEL

To the problem, the utility model provides a digital sound console recording system mainly solves current digital sound console and records through a plurality of intermediate facilities, leads to the problem that system reliability is low.

In order to solve the technical problem, the technical scheme of the utility model as follows:

a digital sound console recording system comprising: the analog filter unit is used for receiving the two paths of analog signals output by the digital sound console and outputting two paths of primary filtering signals; the pre-filter unit is used for receiving the primary filtering signals of the two paths and outputting secondary filtering signals of the two paths; the analog-to-digital converter unit is used for receiving the secondary filtering signals of the two paths and converting the secondary filtering signals into digital signals of the two paths; the audio processing unit is used for receiving the digital signals of the two paths and storing the digital signals as digital format files; and the USB interface unit is used for receiving the digital format file and transmitting the digital format file to the USB flash disk.

In some embodiments, the analog filter unit comprises a two-way operational amplifier, the analog filter unit employing a low-pass filtering architecture.

In some embodiments, the two-way operational amplifier is an NJM4580M two-way operational amplifier, wherein one of the primary filtered signals is differentially input to the second pin and the third pin of the NJM4580M two-way operational amplifier, the other of the two-way primary filtered signals is differentially input to the sixth pin and the fifth pin of the NJM4580M two-way operational amplifier, and the first pin and the seventh pin of the NJM4580M two-way operational amplifier output two-way secondary filtered signals.

In some embodiments, the pre-filter unit includes two identical pre-filters, the pre-filter includes a first resistor and a first capacitor connected in series, an input terminal of the first resistor is connected to the first pin of the NJM4580M two-way operational amplifier, the second filtered signal of the output of the first capacitor is connected to the analog-to-digital converter unit, a node between the first resistor and the first capacitor is connected to a digital ground through a second resistor, and an output terminal of the first capacitor is connected to the digital ground through a second capacitor and a third capacitor connected in parallel.

In some embodiments, the adc unit is an MS5358 stereo a/D converter, the two channels of the second-order filtered signal are respectively connected to a first pin and a second pin of the MS5358 stereo a/D converter, and a ninth pin, a tenth pin, and a twelfth pin of the MS5358 stereo a/D converter are respectively connected in series to a pull-down resistor.

In some embodiments, the audio processing unit is a BU94702USB audio decoder, the ninth pin, the tenth pin, and the twelfth pin of the MS5358 stereo a/D converter are connected to the eighth pin, the sixth pin, and the seventh pin of the BU94702USB audio decoder, respectively, and the forty-first pin and the forty-second pin of the BU94702USB audio decoder output a USB data negative signal and a USB data positive signal to the negative signal receiving terminal and the positive signal receiving terminal of the USB interface unit, respectively.

The utility model has the advantages that: before the digital sound console outputs the record, the USB flash disk is inserted into the USB interface unit, double-channel analog signals output by the digital sound console are sequentially input into the analog filter unit, the pre-filter unit, the analog-to-digital converter unit and the audio processing unit, the record is directly stored in the USB flash disk after data processing, and the system reliability is high.

Drawings

Fig. 1 is a schematic structural diagram of a digital sound console recording system disclosed by the utility model;

fig. 2 is a schematic circuit connection diagram of the digital sound console recording system disclosed by the present invention;

fig. 3 is a schematic circuit diagram of an analog filter unit according to the present invention;

fig. 4 is a schematic circuit connection diagram of the pre-filter unit disclosed in the present invention;

fig. 5 is a schematic circuit connection diagram of an analog-to-digital converter unit according to the present invention;

fig. 6 is a schematic circuit diagram of the audio processing unit according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the following will explain the contents of the present invention in detail with reference to the accompanying drawings and the detailed description. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present invention are shown in the drawings.

As shown in fig. 1 and 2, this embodiment provides a digital sound console recording system, which includes an analog filter unit 1, a pre-filter unit 2, an analog-to-digital converter unit 3, an audio processing unit 4, and a USB interface unit 5 integrated on a peripheral circuit of a digital sound console control unit, where before outputting a recording, a USB disk is inserted into the USB interface unit 5, two analog signals output by the digital sound console are sequentially input into the analog filter unit 1, the pre-filter unit 2, the analog-to-digital converter unit 3, and the audio processing unit 4, and after data processing, the recording is directly stored in the USB disk, so that the system reliability is high. Wherein:

the analog filter unit 1 is used for receiving the two-path analog signals output by the digital sound console and outputting two-path primary filtering signals.

Specifically, the analog filter unit 1 includes a two-way operational amplifier, and the analog filter unit 1 adopts a low-pass filtering structure and is configured to perform anti-aliasing processing on the analog signal. The dual-path operational amplifier is preferably an NJM4580M dual-path operational amplifier, and NJM4580M is a dual-path operational amplifier specifically designed for enhanced audio control, most suitable for audio applications. The product has no noise, higher gain bandwidth, high output current and low distortion, and is not only very suitable for the sound electronic part and the active filter of a sound preamplifier, but also suitable for industrial measuring tools. It is also applicable to headphone amplifiers and the like of higher output current, and it can be applied to general-purpose and convenient operational amplifiers, and to low-voltage single-power-supply type of appropriately biased low-voltage power supply. As shown in fig. 3, one path of the primary filtered signal of the NJM4580M dual-path operational amplifier is differentially input to the second pin (inverting input terminal) and the third pin (non-inverting input terminal) of the NJM4580M dual-path operational amplifier, the other path of the primary filtered signal of the dual-path operational amplifier is differentially input to the sixth pin (inverting input terminal) and the fifth pin (non-inverting input terminal) of the NJM4580M dual-path operational amplifier, and the first pin and the seventh pin of the NJM4580M dual-path operational amplifier output dual-path secondary filtered signals.

The pin definitions of the NJM4580M dual-path operational amplifier are shown in Table 1, and the wiring of other pins can be referred to the chip handbook thereof.

TABLE 1NJM4580M two-way operational amplifier pin definition

PINFUNCTION
	1.AOUTPUT
2.A–INPUT
	3.A+INPUT
4.V-
	5.B+INPUT
6.B–INPUT
	7.BOUTPUT
8.V+

And the pre-filter unit 2 is used for receiving the primary filtering signals of the two paths and outputting secondary filtering signals of the two paths. The pre-filter, also called anti-aliasing filter, functions as: (1) Useful signals are separated from noise, and the anti-interference performance and the signal-to-noise ratio of the signals are improved; the filter is used for improving the quality of a power supply and the linearity of a circuit, reducing various clutter and nonlinear distortion interference, reducing harmonic interference and the like. (2) And the uninteresting frequency components are filtered out, so that the analysis precision is improved. (3) A single frequency component is separated from the complex frequency components.

Specifically, as shown in fig. 4, the pre-filter unit 2 includes two identical pre-filters, the pre-filter includes a first resistor and a first capacitor connected in series, an input terminal of the first resistor is connected to a first pin of the NJM4580M dual-channel operational amplifier, a secondary filtered signal output by the first capacitor is connected to the analog-to-digital converter unit, a node between the first resistor and the first capacitor is connected to a digital ground through a second resistor, and an output terminal of the first capacitor is connected to the digital ground through a second capacitor and a third capacitor connected in parallel.

And the analog-to-digital converter unit 3 is used for receiving the two-path secondary filtering signals and converting the two-path secondary filtering signals into two-path digital signals.

Specifically, as shown in fig. 5, the analog-to-digital converter unit 3 is an MS5358 stereo a/D converter, two paths of secondary filtering signals are respectively connected to a first pin (right channel analog input pin) and a second pin (left channel analog input pin) of the MS5358 stereo a/D converter, and a ninth pin (audio serial output pin), a tenth pin (output channel clock pin) and a twelfth pin (audio serial data clock pin) of the MS5358 stereo a/D converter are respectively connected in series with a pull-down resistor.

The pin definitions of the MS5358 stereo a/D converter are shown in table 2, and the wiring of the other pins can be referred to its chip manual.

TABLE 2NJMS5358 stereo A/D converter pin definitions

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And the audio processing unit 4 is used for receiving the two paths of digital signals and storing the digital signals as a digital format file.

Specifically, as shown in fig. 6, the audio processing unit 4 is a BU94702USB audio decoder, the ninth pin, the tenth pin, and the twelfth pin of the MS5358 stereo a/D converter are respectively connected to the eighth pin, the sixth pin, and the seventh pin of the BU94702USB audio decoder, and the forty-first pin and the forty-second pin of the BU94702USB audio decoder respectively output a USB data negative signal and a USB data positive signal to the negative signal receiving terminal and the positive signal receiving terminal of the USB interface unit. The chip manual can be referred to for the pins and wiring mode of the MBU94702USB audio decoder.

The USB interface unit 5 is configured to receive the digital format file and transmit the digital format file to the disk, and the USB interface unit 5 is a conventional USB interface and is not described herein again.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A digital sound console recording system, comprising:

the analog filter unit is used for receiving the two paths of analog signals output by the digital sound console and outputting two paths of primary filtering signals;

the pre-filter unit is used for receiving the primary filtering signals of the two paths and outputting secondary filtering signals of the two paths;

the analog-to-digital converter unit is used for receiving the two paths of secondary filtering signals and converting the two paths of secondary filtering signals into two paths of digital signals;

the audio processing unit is used for receiving the two paths of digital signals and storing the digital signals as digital format files;

and the USB interface unit is used for receiving the digital format file and transmitting the digital format file to the USB flash disk.

2. The digital sound mixing console recording system according to claim 1, wherein the analog filter unit comprises a two-way operational amplifier, and the analog filter unit adopts a low-pass filtering structure.

3. The digital sound mixing console recording system according to claim 2, wherein the two-way operational amplifier is an NJM4580M two-way operational amplifier, wherein one of the primary filtered signals is differentially input to the second pin and the third pin of the NJM4580M two-way operational amplifier, the other of the two-way primary filtered signals is differentially input to the sixth pin and the fifth pin of the NJM4580M two-way operational amplifier, and the first pin and the seventh pin of the NJM4580M two-way operational amplifier output the two-way secondary filtered signals.

4. The digital sound console recording system according to claim 3, wherein the pre-filter unit comprises two identical pre-filters, the pre-filter comprises a first resistor and a first capacitor connected in series, an input end of the first resistor is connected to a first pin of the NJM4580M two-way operational amplifier, the secondary filtered signal of the output of the first capacitor is connected to the analog-to-digital converter unit, a node between the first resistor and the first capacitor is connected to a digital ground through a second resistor, and an output end of the first capacitor is connected to the digital ground through a second capacitor and a third capacitor connected in parallel.

5. The digital sound console recording system according to claim 4, wherein the analog-to-digital converter unit is an MS5358 stereo A/D converter, the two paths of the secondary filtered signals are respectively connected to a first pin and a second pin of the MS5358 stereo A/D converter, and a pull-down resistor is respectively connected in series to a ninth pin, a tenth pin and a twelfth pin of the MS5358 stereo A/D converter.

6. The digital sound console recording system according to claim 5, wherein the audio processing unit is a BU94702USB audio decoder, the ninth pin, the tenth pin and the twelfth pin of the MS5358 stereo A/D converter are respectively connected with the eighth pin, the sixth pin and the seventh pin of the BU94702USB audio decoder, and the forty-first pin and the forty-second pin of the BU94702USB audio decoder respectively output a USB data negative signal and a USB data positive signal to the negative signal receiving terminal and the positive signal receiving terminal of the USB interface unit.