Setting for IP cameras with audio line-in

Some IP cameras have a built-in audio line-in or bi-wire output that requires a bi-wire connection. At first, it may seem odd how an RCA microphone plugs into a two-wire input. For example, in the next section, we use a video balancing connector, a BNC-RCA connector, and a two-wire wire to connect a microphone to the line-in box.

To connect a microphone to a camera with a two-wire audio line-in cable, you need the following items.

1) Outdoor microphone or internal microphone;

2) Power supply 12V DC, 500mA;

You can also use PoE with a DC divider cable.

If you do not know what baluns are for video surveillance, we recommend reading our previous article “What are baluns in video surveillance systems?”

Setting for IP Cameras with RCA Audio Input

Here’s what you need to connect a microphone to an IP camera that has RCA audio inputs:

1) Outdoor microphone or internal microphone;

2) Power supply 12V DC, 500mA;

You can also use PoE with a DC divider cable.

How to connect a microphone using a two-wire cable?

The method is the same even if your camera is equipped with a 2-wire pigtail audio input.

1) Open the dome cover of the camera with the supplied hex key. Do not use power screwdrivers or drills, otherwise you will damage the dome;

2) Connect BNC jack to RCA jack and balun;

3) Connect the RCA plug to the RCA input on the microphone;

4) Use the video balun to connect the two wires, tighten the screws for the wires;

a) Make sure you remember the polarity of your wires. We recommend using red for the positive wire and black / striped for the ground / negative wire;

b) Bad connection or wrong polarity will not record sound or create loud noise;

5) Find a small rubber insert next to the Audio / Alarm block and create a small hole for the wires;

6) Slightly loosen the screw for the Audio-In connector on the unit. Insert the positive wire from the video balun and screw it on;

7) Slightly loosen the screws for grounding (GND). Insert the ground wire from the video balun and screw it on;

8) Connect the power cable for the microphone to a 12V DC power source that is connected to an AC wall outlet. Connect the power supply to the microphone;

a) Alternatively, you can use a PoE splitter with 1 to 2 DC splitter;

b) Connect the PoE cable for the camera to the PoE splitter. Then connect the PoE splitter to DC splitter 1 to 2;

c) Connect the camera and microphone to the DC power divider connectors;

d) Connect the RJ45 connector coming from the PoE splitter to the connector on the camera;

After you finally connect your camera and microphone, you can continue to follow the rest of this guide to learn how to enable audio input on your camera.

How to add a microphone to an IP camera?

External Microphone Connection Guide for IP Camera

Most IP security cameras are not equipped with built-in microphones. This means you need to manually add a microphone to record audio. Most IP security cameras with audio input have an RCA audio jack for microphone connection. Some IP dome cameras have a dedicated connector block. In any case, manually connecting and configuring external microphones to the IP camera is very easy as shown in this guide.

How to connect microphone to IP camera with RCA audio input

Below is the diagram for connecting an external microphone to the RCA audio jack on the IP camera.

connect, microphone, action, camera

Connecting a microphone is easy by following these simple steps:

1) Connect a microphone to the RCA audio input using the RCA male connector. RCA dad

2) For longer distances between camera and microphone, you can use RCA cable with male ends to connect input and output.

3) Connect the power plug from the 12V DC power supply to the power jack on the microphone.

Alternatively, you can also use PoE with a 1 to 2 DC power divider to use PoE for microphone and camera. Just connect the PoE cable to the PoE splitter. Then, use a DC coupler to separate the power of the camera and microphone. Then the PoE splitter cable is connected to the camera.

Once you’ve properly connected your microphone to your camera, you can skip to the rest of the article to learn how to enable the camera’s audio input for listening and recording.

How to find out which camera you have?

Depending on whether your camera is connected to RCA or bi-wire, follow the appropriate sections below.

Connecting a microphone using a two-wire cable;

How to enable audio recording on an IP camera

Once everything is connected, you must configure the camera to recognize and use an external microphone. This step is extremely important before trying to listen to and record audio. Don’t assume the camera automatically records audio when you plug in a microphone.

Using a browser to enable and change sound settings

This process requires knowledge of the IP address of the camera. Using this address, you can connect to your camera and make the necessary settings to turn on the microphone.

After you have connected to your camera. go to the Camera Audio page. There you will find the sound settings. You can enable audio for main stream or sub stream, adjust volume settings and enable noise filter. Also, if the camera has a built-in microphone, you can configure it to use an external microphone.

Do you need advice from our specialists in video surveillance? Call us by phone: 7 (495) 132-33-24 We will gladly answer all your questions and will be able to provide all the necessary services for the installation and connection of the IP video surveillance system.

How to Connect Microphone to GoPro Hero5 / 6/7/8 or Hero9 Black Cameras?

A very important point for many when using a GoPro action camera is the sound quality, which will not be satisfactory in a noisy place, when shooting a blog on a motorcycle or in many other situations.

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Previous GoPro models (Hero3, 3, 4) used an analog input and supported microphones via an adapter (miniUSB. 3.5 Jack)

GoPro Hero5, Hero6, Hero7, Hero8, Hero9 Black have a different situation, they do not allow using an analog connection for an external microphone.

These cameras use the USB-C standard. It has several advantages over previous generations of connectors:

  • It supports USB3.1 standard with high speed up to 10Gbps
  • higher voltage. up to 20V (100W)
  • current strength up to 5A

In the digital age, GoPro is ditching analog signal in favor of digital.

In order to connect almost any microphone with a standard 3.5mm jack, you need a special microphone adapter for GoPro Hero 5, Hero 6, GoPro Hero 7, Hero 8 or Hero 9 Black cameras.

This adapter (model AAMIC-001) is nothing more than a conventional microphone analog to digital signal converter for GoPro Hero9, 8, 7, 6 or 5 Black.

The USB-C cable from the adapter connects to the camera, and a lavalier or other type of microphone is connected to the adapter itself via a 3.5mm jack. Also, the adapter has a USB-C output, which allows you to connect the action camera to a PC or for charging without disconnecting the adapter itself from the camera.

When recording video and using a converter adapter, the camera will create a standalone professional WAV file for each video that this Pro 3.5mm Microphone Adapter uses.

Let’s take a look at the difference in audio recording on GoPro Hero 4 and GoPro Hero5 / Hero6 / Hero7 / Hero8 / Hero9 Black.

When connecting a microphone to Hero5, Hero6, Hero7, Hero8, Hero9 Black cameras, it is enough to connect the adapter to the camera, and the microphone to the adapter. After that, the sound will be automatically recorded to the external microphone.

Connect a microphone to the USB-C port on your camera using the 3.5mm GoPro Microphone Adapter (sold separately)

On the camera home screen, swipe down to open the control panel

Tap Options Input / Output Audio Input. signal”

Parameter Description
standard microfarad. (default) Supports no power microphones
standard uf. Support for microphones without power and 20 dB gain
microfarad. with meals Powered microphone support
microfarad. with meals Supports microphones with power and 20dB gain
external device support for line-out from other audio equipment (mixing console, guitar amplifier, karaoke, etc.).

GoPro Hero 4: External Microphone 3.5mm Microphone Adapter 3.5mm microphone connects to 10-pin miniUSB camera.

When using miniUSB microphone: miniUSB microphone connects the microphone to the 10-pin miniUSB of the camera.

The Hero4 then recognizes the signal from the microphone, bypasses its built-in microphone, and uses the signal from the external microphone instead. Audio remains stereo, only 2 channels in MP4 video output from Hero4.

GoPro Hero 9, Hero 8.Hero 7, Hero 6 and GoPro Hero 5 Black: external microphone analog signal Pro 3.5mm microphone adapter / analog signal converter converted to digital WAV using an adapter / converter convert the signal to USB-C standard, so it can use USB-C signal transmission to create a separate WAV audio file while the MP4 still has its own audio track.

Thus, the created MP4 video is still stereo, but an additional WAV audio file is available as a separate audio track from the external microphone.

This is why this adapter / converter cannot be as cheap and small as the small adapter in previous models, because it has electronics that converts the analog signal to digital. and can also charge / transfer information via USB-C.

GoPro, of course, could add the ability to connect a microphone via a simple adapter (cable) and not use this expensive 3.5mm USB-C microphone adapter, but that would add a processor load when creating such a professional soundtrack in a WAV file.

This would lead to an increased discharge of the camera battery and a higher heating temperature.

WAV file has high level characteristics: 32-bit PCM, 1024 Kbps, 48000Hz, 4 channels.

Many buyers of GoPro Hero 5, Hero 6, Hero 7, Hero 8, Hero 9 Black complain that GoPro makes high-quality sound lovers buy an expensive adapter that is not worth the price and unreasonably expensive, hinting that this is a way of deception companies of their buyers.

This is not true. This adapter for connecting a microphone to GoPro 9, 8, 7, 6 or GoPro 5.complex electronic device that definitely cannot be cheap.

Benefits of connecting a microphone

The use of an external device helps to create a control area in accordance with the specifics of the technical task. An increase in sensitivity (range) is permissible in comparison with the analogue built into the camera.

Connection diagram

For standard color coding of cable products, the connections are made as follows:

  • the core with the yellow sheath is connected to the center conductor of the tulip;
  • black. to the external contact and the minus of the power supply;
  • red. to the plus.

The manufacturers’ official instructions show you how to connect a microphone to your CCTV. Several cameras and microphones are connected to the corresponding channel numbers. In some situations, cable splitters, adapters may be needed. If twisted pair is connected using PoE standard, multiple wires can be used for power supply.

Equipment types

  • electrodynamic;
  • condenser.

Electrodynamic models convert sound waves using an induction coil. The movement of this functional element along the central axis of the core produces a weak signal. In order not to use an amplifier, limit the length of the connecting wires. Microphone performance is ensured without being connected to a power source.

Modern devices are more often created using a capacitor circuit.

  • high sensitivity;
  • compactness;
  • wide bandwidth.

Some models are equipped with a built-in amplifier with automatic output control.

Electrodynamic microphones are connected to a constant voltage source of 1.5-14 V. You can purchase a modification with a USB cable for connecting to a standard port (5V).

Do I need to solder the contacts and how to do it

If the standard connectors do not fit, you can connect the wires to another adapter. Twist is not used to ensure a reliable connection and no interference with signal transmission.

To carry out installation work, you need to prepare:

  • soldering iron 25 W with stand;
  • knife;
  • side cutters;
  • tweezers;
  • rosin and solder.

The sequence of actions for the example of the RCA connector:

  • remove the outer sheath of the coaxial cable (10-15 mm);
  • uncoil and twist the shielding from copper conductors;
  • remove the sheath from the central core (5-6 mm);
  • perform maintenance of the released parts;
  • the center conductor is soldered;
  • cut off the screen to eliminate a short circuit with the signal line;
  • solder this contact to the terminal of the external connector element;
  • install a plastic casing that fixes the correct position of the functional components of the structure.

At the final stage, check the integrity of the current-carrying circuits with a multimeter.

Methods for connecting a microphone to a surveillance camera

To expand the working area of ​​sound recording, specialized external devices are used. Use the accompanying documentation to figure out how to connect a microphone to a camera in a standard situation. An in-depth study of the topic will help you to install and configure the equipment, taking into account the specifics of the project. In addition to general principles, it is recommended to clarify the sequence of working steps, prepare the necessary tools and consumables.

Microphone jacks

In addition to the “tulip” (RCA), the following types of connectors are used:

  • male Jack (3.5 mm) with 3 or 4 contacts;
  • reduced modification mini-jack (2.5 mm);
  • USB or USB-C.
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Choosing a microphone to connect to the camera

An electroacoustic device is evaluated according to the following characteristics:

  • directional diagram;
  • sensitivity;
  • frequency range;
  • sizes;
  • appearance;
  • resistance to external influences.

The radiation pattern defines the configuration of the zone in which a sufficiently large amplitude of the output signals is provided. In typical microphones, the graph looks like a heart, which explains the specific name. cardioid characteristic.

Directional patterns feature a narrow figure-of-eight pattern. This solution increases the range, eliminates the “dead zone” in the back of the device.

Sensitivity measures the efficiency of converting sound waves into an electrical signal at the output. This parameter is measured under special conditions in the absence of the parasitic influence of reflected waves. Average performance of electrodynamic (condenser) microphones. 65 ± 5 dB (40 ± 5 dB).

In the official data on the website or in the technical passport, manufacturers indicate the range. Serial models create a sufficiently strong signal at the output when the distance of the sound source is no more than 18-20 m.

To correctly assess the performance of the recording system, when choosing a microphone, the features of the directional pattern are taken into account. Control in a narrow area, for example, eliminates extraneous noise.

  • it is convenient to use a compact microphone for hidden installation;
  • to capture human speech, audio recording is required in the range from 80 to 8000 Hz;
  • if it is intended to be installed outdoors, check the resistance of the device to adverse weather influences.

It is necessary to check the compatibility of the microphone with the video camera (recorder).

The procedure for connecting to a CCTV camera

In addition to the equipment kit, you need to prepare the necessary tools and wires. An inexpensive telephone cable can be used to carry the signal in the room. An alternative solution is twisted pair. Both options are suitable for a current-carrying circuit of no more than 3 meters.

The coaxial cable performs better than the above products when connecting a microphone to the camera. Double shielding with aluminum foil and copper braid prevents signal distortion by electromagnetic interference. The robust outer shell protects against mechanical damage. The only drawback is the limited flexion angle. Honor needs this nuance when planning a route route.

Microphone for PoE IP Camera.

Considering the constantly increasing requirements for the level of security, video surveillance systems with the ability to audio monitoring are becoming more and more popular. Different situations arise on protected objects and the presence of sound recording can be of significant help. This article will discuss in detail the types of microphones and their use in practice in various video surveillance systems.

An active microphone amplifies the signal in the microphone circuit, passive. not.

Passive microphones are used with an external amplifier and have a low noise level, but unlike active models, they are not as versatile.

Today, video surveillance systems use only active microphones, despite the fact that they require adjustment and pick up extraneous noise.

Active microphones can be with or without automatic level control (AGC).

By design, microphones are divided into built-in video cameras and external ones, which are connected to a camera or recorder by cable.

Built-in microphones have a number of disadvantages: they are wide directional and cannot provide the desired sound quality, since they pick up all the ambient noise. Such microphones are not sensitive enough and are not able to correctly transmit sound from a distance of several meters.

For full coverage of the protected area, video cameras are installed on the ceiling or in the corners of rooms, but these places are poorly suited for obtaining high-quality sound. These placement points receive multiple reflections of sound waves, which requires sophisticated amplification and noise reduction circuits.

Therefore, when designing, in order to obtain a directional sound stream from the observation area, it is necessary to use external active microphones.

Practical use of microphones.

Today, the most common video surveillance systems with microphones are IP-based systems:

Audio transmission in an IP system has no range restrictions.

IP cameras have an audio input, when a microphone is connected, the sound waves are digitized by the IP camera processor and the sound is inseparably added to the camera’s video stream. This solves the problem of synchronizing digital video with analog audio.

The IP recorder is capable of receiving any number of audio channels combined with the stream of IP cameras.

There are several barriers to implementing an IP project with microphones.

According to the type of power supply, IP cameras are divided into two types: using power from 12 volt DC lines and powered by PoE technology. over, PoE power is more often used for indoor cameras.
Microphones, in most cases, are installed indoors, but their internal filling is based on support for 12 Volt power supply, and PoE technology transmits 48 Volts over communication lines and does not allow adding additional consumers to the power line. Microphones require additional 12 Volt power supplies and a power cable pull-through, which “negates” the benefits of using PoE. On the PoE line, you can additionally install a splitter that converts individual 12 volts to the microphone, but this will lead to an increase in the cost of the video surveillance system and a decrease in the stability of its operation.

High sensitivity audio input of IP cameras.

IP cameras have a very sensitive audio path compared to analog equipment. A standard microphone creates too high signal amplitude in the audio path of the IP camera, which entails a high level of noise and distortion. Possible Solution. this is the use of microphones with automatic level control, but in practice this adjustment is not enough to achieve an acceptable noise level.

It is possible to select IP-cameras with microphones with more impedance-matched inputs. But such a selection will not be a durable solution, since the audio paths differ even in IP cameras of the same series, in addition, there is a constant equipment update.
For many models of IP cameras, which are optimal for a video surveillance system in terms of their parameters, the audio input is too sensitive to work with existing microphones. It is possible to use expensive microphones with a wide adjustment range, or add an additional trimming resistor to the microphone circuit, but such microphones are more expensive than a camera, and soldering is possible only in isolated cases.

DIY EXTERNAL MICROPHONE | FOR ANY ACTION CAMERA | MOTOVLOGGING SETUP| MOTOVLOG #016

PoE Powered IP Camera Microphone.

Based on the results of the installation of equipment at the sites, it became clear that there was a need for microphones compatible with the sensitive audio inputs of IP cameras (including ComOnyx). At the same time, it is important to support IP cameras with PoE power supply.
Microphone CO-MF01. was developed by the ComOnyx brand for IP cameras with PoE power supply, as a competitive solution in the budget range, after which the CO-MF02 was released on its basis, featuring improved characteristics.

An important feature of the CO-MF02 is the ability to be powered from the audio input of the IP camera.
The audio path of the IP camera has a certain level of constant voltage, it can fluctuate from 1 to 4 volts. Depending on the total electrical resistance from 1 to 16 kOhm (including the dynamic resistance of the microphone, which depends on the voltage level of the audio path of the IP camera), the audio input is capable of supplying power to the device with a current of 0.2 to 3 mA. (Data is based on tests performed on ComOnyx IP cameras).
The improved sensitivity characteristics of the CO-MF02, with a minimum of 1.5 Volts no-load and 1mA supply circuit current, allow the output signal amplitude level acceptable for successful operation.
ONIX successfully tested the CO-MF02 microphone with ComOnyx IP cameras of the CO- series. including rotary models.

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It is important to take into account the fact that this microphone model does not work with every IP camera, for certain models the audio input does not give the desired values, there are also cameras that do not have a “phantom voltage” of the audio input by their design.

Microphone CO-MA01. designed for IP cameras with 12V power supply.

Development of an additional microphone with 12V power supply proved to be necessary, as not all IP cameras with sensitive audio input support CO-MF02.
For IP cameras, the output level from standard 12V microphones is too high. As a result, the user hears a harsh sound and an increased noise level. This is due to poor match of the audio input of the IP camera with the audio output of the microphone.
This problem is faced by both installers of video surveillance systems and end users. You can solve the issue yourself by soldering the “matching circuit” from a trimmed resistor and lowering the microphone output signal level to the level acceptable for the camera.

Based on the results of testing ComOnyx IP cameras with samples of microphones with different output voltage levels, the CO-MA01 was launched into production. In terms of signal strength, this microphone model is suitable for most IP cameras. The peak output signal of the first version of CO-MA01 is 2000 volts. Subsequently, the amplitude of the output signal was increased to 2V. As practice has shown, most IP cameras with a sensitive audio input are capable of receiving this level with acceptable distortion.

Microphone CO-MA02. with an output signal amplitude increased to 3V, was developed for IP cameras and recorders.

If the sensitivity of the CO-MA01 is insufficient. at the output, the operator will receive a high-quality, but quiet signal. The solution will be a version of the active microphone CO-MA02, which has an increased amplitude of the output signal.

Microphone CO-MA03 with controlled AGC circuit and output signal amplitude from 0 to 4000 mV, was developed for IP cameras and recorders.

Microphone CO-MA03 has the ability to adjust the AGC gain circuit.
In many cases, this adjustment will help the installer to optimally adjust the microphone signal level for the room.

The main problems faced by users of active external microphones are:

  • This is a complex organization of microphone power supply when using PoE technologies.,
  • The problem is the inconsistency of the microphone output level with the audio input capabilities of modern cameras.

Both problems can be solved by new developments:

CO-MF02. CCTV phantom power microphone, indispensable when using IP cameras with PoE function, as it does not require additional power;

CO-MA01, CO-MA02, CO-MA03. CCTV microphone with active 12V power supply, designed for use with IP cameras and recorders with audio input of different sensitivity.

Taking into account the security requirements and the popularity of video surveillance systems with the possibility of audio monitoring, different types of microphones are used. An active microphone amplifies the signal in the microphone circuit, passive. not. Basically, only active microphones are used, which can be either with automatic level control (AGC) or without it. Microphones are also divided into built-in and external microphones connected to a camera or recorder. Active microphones are used to receive a directional sound stream from the observation area. The most common video surveillance systems with microphones. these are IP based systems. Microphone power types: from the 12V DC line and from the phantom currents of the audio input of the IP camera.

Alexander Minasyan
Technical Director of ONIX company

Microphone for GoPro Hero 2/3/3/4 Boya BY-LM20

This device is omnidirectional and is of the lavalier type. In addition, it can be called capacitor. The set includes a cord, the length of which is 120 cm.The device can be fixed not only on the camera, but also, for example, on clothes.

Sony external microphone ecm-ds70p

This microphone is great for the GoPro Hero 3/3/4 action camera. It allows for enhanced audio levels. In addition, the device has an increased durability of the external design.

How to setup a mic with a action camera

It should also be noted that there is an effective system of protection against wind and unwanted noise. There is a 3.5 mm type output.

Features of the

An action camera microphone is a device that must meet certain requirements and have a number of characteristic features. For example, it is important that such a microphone is fairly compact in size as well as light in weight. Thus, you can easily and quickly connect it to the camera, without creating additional burden.

Another important factor is the robust outer casing. At the same time, it is desirable that it be waterproof, as well as have other protective systems (for example, shockproof protection).

Lavalier microphone CoMica CVM-V01GP

The model is an omnidirectional device and can be used in conjunction with action cameras GoPro Hero 3, 3, 4. The distinctive features of the device include a portable design, as well as the highest quality sound recording.

The device can be used to record interviews, lectures, seminars.

Thus, there is a wide variety of microphone models for action cameras on the market today. However, special attention and care should be taken when choosing such devices. Only then can you be sure that you have purchased a microphone that meets all your needs and desires.

Model overview

There are a large number of microphones for action cameras on the market today. All of them differ in functional features (for example, some models are lavalier or equipped with a Bluetooth function), as well as external design. Consider some of the most popular and demanded models among buyers.

Commlite CVM-V03GP / CVM-V03CP

This device is versatile, can be used in conjunction with photo and video cameras, as well as smartphones. The microphone is powered by a special CR2032 battery.

Action camera microphones: features, model overview, connection

The action camera microphone is an essential device for delivering high quality audio while filming. Today in our material we will consider the main features of these devices, as well as the most popular models.

Saramonic G-Mic for GoPro Cameras

This microphone can be classified as professional. It connects to the camera without any additional devices and accessories. The microphone picks up the quietest sounds, can pick up frequencies in the range from 35 to 20,000 Hz.

The weight of this model is only 12 grams.

BYRGPUB.COM 2021