Modern smartphones based on Android have turned into powerful multimedia centers capable of satisfying the most sophisticated user needs. One of the popular functions has become sharing music or watching videos with friends without having to pass the gadget from hand to hand. Manufacturers have introduced the ability to simultaneously work with several audio devices, which creates the effect of a mini-cinema or a cozy party on the road.
However, the standard logic of the wireless protocol implies a one-to-one connection. To bypass this limitation and output sound to two or more pairs at once headphones, you must use specific system settings or third-party software. In this article we will analyze in detail all available methods for implementing this task, from the built-in functions of flagships to universal solutions.
Implementation of such a connection scheme opens up new horizons for joint leisure. You can watch a movie on a plane with a neighbor or share your favorite track without sacrificing sound quality or tangling with wires. It is important to understand that the success of the operation directly depends on the version of the operating system and the hardware capabilities of your smartphone.
Built-in Dual Audio function on Samsung smartphones
The company Samsung has become a pioneer in the mass introduction of the function of simultaneously connecting two audio devices. This technology, known as Dual Audiois available on most current Galaxy models, starting with the S8 series and later. Users do not need to install additional software, since all the necessary drivers are already built into the shell One UI.
To activate the mode, you need to go to the quick settings panel and select the item Settings → Connections → Bluetooth. After pairing the first pair of headphones, the system will allow you to connect a second device without disconnecting the first. In the extended Bluetooth menu, you can select the “Two Phones” or similar option, which distributes the audio stream between both recipients.
Volume balance is controlled independently for each device. This is extremely convenient if one of the listeners wants to make the sound quieter, and the other wants to make it louder. The system automatically synchronizes output, minimizing the latency that often occurs with third-party solutions.
Use headphones from the same series for maximum audio synchronization. Different models may have different signal processing delays, which will create an echo effect.
⚠️ Attention: The Dual Audio function works stably only with devices that support Bluetooth 5.0 and above. When connecting older models, the audio track and video may become desynchronized.
It is worth noting that the simultaneous operation of two Bluetooth channels increases the load on the battery smartphone. The power consumption of the communication module almost doubles, since the processor has to encode and transmit two independent data streams. It is recommended to monitor the battery level when using this function for a long time.
Using the “Broadcast” mode on Xiaomi and other brands
Ecosystem Xiaomiincluding brands Redmi i POCO, offers similar functionality, but implemented through the accessibility menu. This feature is often called “Broadcast” or “Audio Broadcast” and allows you to duplicate audio to an unlimited number of compatible devices within range.
To activate the mode, go to Settings → Additional settings → Accessibility → Hearing. Here you will find the Broadcast toggle. After turning on, the smartphone will begin searching for available devices in broadcast mode. This solution is especially relevant for organizing group listening in public places.
Unlike a paired connection, the broadcast mode uses a protocol Bluetooth LE Audiothat requires support from receiving devices. If your headphones are new enough, they will automatically pick up the signal. Otherwise, you may need to use a special receiver adapter.
The advantage of this method is scalability. You can connect not two, but three, four or more pairs of headphones, turning your phone into a full-fledged transmitter for a small audience. However, the sound quality may decrease slightly due to the peculiarities of data compression in broadcast mode.
Connecting through third-party applications (SoundSeeder and analogues)
If your smartphone does not support the native multi-connection function, applications from the store come to the rescue. Google Play. The leader in this niche is a app SoundSeederthat creates a local Wi-Fi network for synchronizing audio between several devices.
The principle of operation is that one phone acts as a “server” (sound source), and other devices connect to it as “clients”. It is important to understand that for this scheme to work, each listener will need their own smartphone or tablet with the application installed.
The setup process is as follows:
- 📲 Install the SoundSeeder application on all devices participating in listening.
- 🔗 Connect all gadgets to the same Wi-Fi network or create an access point on the main one phone.
- 🎵 Launch the application on the source and select the “Music Player” role, and on other devices - “Speaker”.
- ⚙️ Wait for the devices in the list to be automatically searched and connected.
☑️ Check before launching SoundSeeder
The main advantage This approach is independent of the Bluetooth version and phone model. You can combine devices from different manufacturers to create a powerful audio system. Synchronization occurs with high accuracy, although a minimum delay in milliseconds may still be present with a poor Wi-Fi signal.
Features of working with Bluetooth 5.0 and later
Wireless communication technologies do not stand still, and the standard Bluetooth 5.0 brought with it the ability to transmit data to two devices simultaneously on hardware level. This means that the smartphone chipset is physically capable of supporting two active audio channels without the need for software tricks.
However, the presence of a new standard in the phone's specifications does not guarantee the function will work out of the box. Manufacturers often programmatically limit this ability to encourage the purchase of more expensive models or ecosystem accessories. However, on many devices with processors Qualcomm Snapdragon this function is hidden in the engineering menu.
For advanced users, it is possible to activate multi-audio via USB debugging. To do this, you will need to connect your smartphone to your computer and enter a special command into the console ADB. This method is not recommended for beginners, since incorrect actions can lead to unstable operation of the communication module.
Command for activation via ADB
To enable support for multiple audio devices via ADB, the command is sometimes used: adb shell settings put global bluetooth_multi_audio_mode 1. However, its effectiveness depends on the specific firmware and may not work on blocked devices. bootloaders.
| Bluetooth version | Max. number of devices | Connection stability | Energy consumption |
|---|---|---|---|
| 4.2 and below | 1 (officially) | High | Low |
| 5.0 | 2 (depending on software) | Medium | Average |
| 5.2 / 5.3 | 2+ (LE Audio) | High | Optimized |
Users should take into account that even with support for the 5.0 standard, the distance between the phone and headphones should not exceed 10 meters in line of sight. Walls and other electronic devices can create interference, which is critical when transmitting to several receivers at the same time.
Solving problems with audio desynchronization
One of the most common problems when connecting several headphones is desynchronization. The sound from one device may lag behind another by a fraction of a second, creating an unpleasant echo effect and ruining the listening experience. Most often, this is due to different signal processing speeds between codecs.
To minimize the delay, try changing the codec settings in the developer menu. Go to Settings → About phone → Build number (press 7 times) and go to Developer menu. Find the “Bluetooth Codec” item and try switching it to SBC or AAC, which are the most compatible.
⚠️ Attention: Changing settings in the developer menu may lead to unstable operation of the Bluetooth module. If after the changes the sound disappears completely, reset the network settings.
It is also useful to perform a complete pairing reset. Delete all saved devices from the phone's memory, reboot the gadget and connect again, starting with the device that has the best signal. Sometimes disabling the “Absolute volume level” function in the same developer menu helps.
Desynchronization is most often caused by the use of different codecs on the headphones. Try to use identical models for perfect synchronization.
Alternative methods: Splitters and wired solutions
If wireless methods do not give the desired result or your smartphone is too old to support modern standards, you can turn to proven wired solutions. Special Bluetooth transmitters with a dual connection function allow you to turn any sound source into a multi-transmitter.
Such devices connect to the 3.5 mm or USB-C smartphone and transmit the signal to two pairs of headphones, regardless of the capabilities of the phone itself. This is an excellent solution for traveling on a train or plane, where connection stability is important and you don’t want to drain your phone’s battery.
When choosing a transmitter, pay attention to codec support aptX Low Latency. This technology is specially designed to minimize delays in video and audio transmission, which is critical when watching movies together. Without this support, the sound may lag behind the picture on the actors' lips.
When purchasing a Bluetooth splitter, make sure that it supports the A2DP profile for both channels simultaneously. Cheap models can transmit stereo only to one device, and mono to the second.
Frequently asked questions (FAQ)
Is it possible to connect more than two pairs of headphones to one phone?
Standard Android tools usually support connecting a maximum of two audio devices at the same time. To connect more, you will need to use specialized applications like SoundSeeder, which use a Wi-Fi network, or external Bluetooth transmitters with multipoint support.
Why is the sound in the headphones quiet when two devices are connected?
When the audio stream is distributed into two channels, the signal power can be divided, or system limiters reduce the overall volume to protect the speakers of the Bluetooth chip from overload. Try increasing the volume directly on the headphones themselves if they have physical control buttons.
Does this function work for calls?
In most cases, the Dual Audio function is intended only for media content (music, video). When an incoming call is made, audio is usually routed to only one active device, selected by default in Bluetooth settings, to avoid echo and confusion for the other party.
Does connecting second headphones affect the sound quality?
Theoretically, the channel bandwidth is divided, which can lead to a slight decrease in bitrate, especially if a high quality profile is used. This difference is often not noticeable by ear, but when using high-definition codecs (LDAC), the system can automatically switch to a more compressed format.