Sharing movies or listening to music with a friend on a Xiaomi smartphone often faces a technical limitation: the standard Bluetooth protocol usually allows only one playback device to be connected. But modern technology and software can get around this barrier, turning your smartphone into a full-fledged multimedia center for two. TWS-Headsets or wired models simultaneously without buying expensive equipment.
Owners of devices with a MIUI shell or a new HyperOS have several ways to solve this problem, from built-in functions to the use of specialized transmitters. It is important to understand that the success of the operation depends on the version of Android, the model of the Bluetooth chip and the type of headphones used. In this article, we will discuss in detail all the available methods that will help you divide the audio stream into two independent output channels.
Before you start to complex manipulation of system settings, you need to make sure that your equipment is compatible. Not all Xiaomi smartphones support native Dual Audio function at the operating system level, especially in the budget segment. However, even in the absence of such an option on the menu, there are proven ways to achieve the desired result.
Checking for Dual Audio support in the system
The first step is to diagnose your smartphone. Many modern Xiaomi models, especially the flagship Mi and Xiaomi series, as well as some Redmi Note line devices, have built-in support for simultaneous audio transmission. To check, go to the advanced Bluetooth settings. Open Settings → Bluetooth and click on the three dots or gear in the upper right corner of the screen.
In the menu that opens, look for "Dual Audio" or "Dual Audio." If this option is present and active, you're lucky: the system is ready to broadcast audio to two devices without third-party software. Just turn on the switchboard, attach the first headset, then the second, and the sound will go in parallel. The transmission codec in this case can automatically switch to a more compatible, which is worth considering when assessing the sound quality.
If there is no item on the menu, it does not mean that the feature is completely unavailable, sometimes it is hidden in the engineering menu or only activated when certain accessories models are connected, and the absence of a visible option requires a transition to alternative customization methods, which we will discuss later.
Use of Bluetooth transmitters
The most reliable and versatile way to run on 100% of Xiaomi smartphones regardless of the firmware version is to use an external Bluetooth transmitter.This small device connects to a Type-C or 3.5 mm connector (via an adapter) and takes on the task of multiplexing the audio signal. The transmitter creates its own network, which can connect up to two, and sometimes more pairs of headphones.
When choosing a device, consider supporting aptX Low Latency or aptX Adaptive codecs if you plan to watch video. This is critical for synchronizing sound and picture. Cheap models can produce noticeable latency, causing sound to lag behind video on your smartphone screen. This device usually connects automatically when power is applied.
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When buying a Bluetooth transmitter, make sure it supports Pairing mode for multiple devices at once, rather than just switching between them quickly.
The process of connecting is as follows: insert the transmitter into the charging port of the phone, turn on the pairing mode on the transmitter itself (usually with a long push of a button), then search for devices in the Bluetooth menu of the smartphone. Once you connect the first set of headphones, repeat the procedure for the second. The smartphone will “think” that the sound is going to one transmitter device, and already inside it the signal to split into two threads.
Setup through the developer menu
For advanced users who want to make the most of Xiaomi’s hardware, there’s a developer menu available. Here you can find hidden options that affect the Bluetooth stack. To get there, go to Settings → About Phone and quickly click on the MIUI or OS version seven times. Once you get the message “You’re a developer,” go back to the main settings menu.
In the “Additional” or “Extended Settings” section, you’ll see “Developers” option. Find the Bluetooth section. Options like “Bluetooth AVRCP Version” (try changing to 1.4 or 1.5) or “Bluetoothooth Codec” can be useful here, changing these settings sometimes allows you to activate hidden multiconnect functions that don’t work under standard settings.
⚠️ Attention: Changing the settings in the developer menu can lead to unstable Bluetooth connection or communication break with automotive systems.
Also worth paying attention to is the item "Switch off the absolute volume level," which can help if two devices are connected to one of them, the sound is lost or the volume is not adjusted correctly, a common problem when working with heterogeneous devices.
☑️ Checking Bluetooth settings
Third-party applications for sound separation
If system methods fail, Google Play applications come to the rescue, programs like Audio Share, Sound Assistant or Lesser AudioSwitch allow you to control audio streams more flexibly than the standard Xiaomi shell, some of which can forcefully duplicate a signal for several outputs.
The way these tools work is often to create a virtual audio device or redirect streams. For example, Samsung’s Sound Assistant app (which can be installed on Xiaomi) has a “multi-device audio” feature that allows you to stream audio to other devices on the same Wi-Fi network or via Bluetooth.
When using third-party software, it is important to consider resource consumption. The smartphone processor will be more loaded, as it will have to encode and transmit two independent data streams in real time, which can lead to increased battery consumption and heating of the case during a long movie viewing.
Features of wired connection
And don't discount the classic physical splitter, either. If your headphones have a 3.5mm wired interface, or you use a Type-C adapter, buying a special Y-shaped splitter will fix the problem instantly. This passive device doesn't require power or drivers.
The main difficulty here is to find a quality splitter that supports stereo signal on both outputs. Cheap Chinese counterparts often dilute the left channel on one side and the right channel on the other, turning stereo into mono. Look for the label "Stereo Splitter" or "3.5mm Stereo Audio Y Splitter." For modern Xiaomi without a 3.5 mm connector, you will need an active Type-C adapter on 3.5 mm with support for simultaneous output.
Why do cheap splitters spoil the sound?
The advantage of the wired method is that there is no latency, which is ideal for gamers or for dynamic action viewers, where synchronization of shots and explosions is critical, and the wired connection does not consume the battery power of the Bluetooth module of the smartphone.
Comparison of connection methods
To make it easier for you to choose the best option, we have prepared a summary table of the characteristics of the different methods of connecting two pairs of headphones to Xiaomi.
| Method | Sound quality | Delay (Latency) | Difficulty |
|---|---|---|---|
| Built-in Dual Audio | High. | Low. | Low. |
| Bluetooth transmitter | Medium/High | Depends on the codec. | Low. |
| Annexes (Root) | High. | Medium | Tall. |
| Wire splitter | High. | Absent. | Low. |
As you can see from the table, the built-in feature is the most preferred if it is available on your model. However, a Bluetooth transmitter with support for aptX LL often becomes the only working solution for older phone models, allowing you to maintain wireless comfort.
Remember that when you connect two devices, the total volume can be distributed unevenly, and in some cases, you will need to separately adjust the sound level on each of the headphones, especially if they are from different manufacturers.
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The most stable result without delay gives a wired splitter, but for wireless comfort, an external transmitter with support for aptX Low Latency is best suited.
Possible problems and solutions
You may encounter a number of typical problems during the setup process, and most users complain of the sound being out of sync between two pairs of headphones, one listener hearing a phrase earlier, another late, and this is treated by rebooting the Bluetooth module or reconnecting the devices in the right sequence: first the one that will be the main one, then the second.
Another common problem is that you can't find a second device after you plug in the first one, so try forgetting the first device in your Bluetooth settings, connecting the second one, and then re-addling the first one, sometimes by clearing the Bluetooth cache through the app menu in your smartphone settings.
⚠️ Note: If the first device is automatically disabled when you connect the second device, then your smartphone does not physically support multiple connections. A2DP profiles simultaneously without an external transmitter.
Also worth mentioning is the problem of fast discharge. Two Bluetooth channels significantly speed up your energy consumption. If you plan a long flight or a trip, make sure that both sets of headphones and the smartphone are fully charged, otherwise the evening can be spoiled by suddenly silent sound.