How to connect two headphones to Xiaomi at the same time: Dual Audio on Redmi and POCO smartphones

Connecting two pairs of headphones to the same Xiaomi smartphone is a useful feature for watching movies together, playing games together or synchronous workouts. However, not all users know that modern devices on MIUI 12+ support Dual Audio (or Dual Bluetooth) technology, which allows you to broadcast sound to two wireless gadgets simultaneously. In this article, we will discuss all the working ways of activating the function, the nuances of compatibility and typical errors that interfere with stable operation.

It’s important to understand that the capability depends not only on the firmware version, but also on hardware support, such as smartphones with Bluetooth 5.0 and later (for example, Xiaomi). 11T Pro, Redmi Note 12 Pro+ or POCO F5) They can do the job without problems, whereas on budget models with Bluetooth 4.2 (for example, Redmi). 9A) It can malfunction or not at all. It also affects the type of headphones: earphones with support for the protocol. LC3 (Xiaomi Buds 4 Pro are more stable than devices with outdated SBC.

Before you start setting up, make sure that both sets of headphones are charged and in pairing mode. If one of the gadgets is already connected to the phone, turn it off temporarily, which will simplify the process. Now let's move on to specific methods.

1. Method: Built-in Dual Audio function in MIUI

The easiest method is to use the built-in Dual Audio option available on most Xiaomi smartphones with MIUI 12.5 and later.The feature is hidden in Bluetooth settings, but it is easy to find if you know the way.

Instructions:

• 📱 Open the Settings. → Connections and sharing → Bluetooth.
• 🔗 Connect the first pair of headphones (e.g. Xiaomi Buds) 3T Pro).
• 🎧 Slip on the gear icon next to the headphone name, then select Additional settings.
• 🔄 Turn on the Dual Audio switch (or dual audio).
• 🔍 Now connect the second pair of headphones – the sound will be duplicated on both devices.

If Dual Audio is not on the menu, your model is not firmware-level, so go to alternative methods (see the following sections). Also note that Dual Audio can slightly increase latency when activated, which is normal for most mid-range smartphones.

2. Method: SoundAssistant application (for older versions of MIUI)

If your smartphone is running MIUI 11 or earlier, where there is no built-in Dual Audio feature, you can use Samsung’s official SoundAssistant app. Although it’s designed for Samsung devices, it also works well on Xiaomi, Redmi, POCO.

Step-by-step:

1. Download SoundAssistant from Google Play.
2. Open the app and provide all the necessary permissions (access to Bluetooth, media files, etc.).
3. Go to the Dual Audio section.
4. Activate the function and connect both pairs of headphones through the standard Bluetooth menu.
5. Return to SoundAssistant and select both devices for simultaneous playback.

The advantage of this method is flexibility of settings: you can adjust the volume for each headphone separately or synchronize it. However, note that on some Xiaomi models (for example, the Redmi Note 10 Pro), the application may not work stable due to conflicts with proprietary MIUI services.

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If SoundAssistant doesn’t see the second pair of headphones, try connecting them first through the standard Bluetooth menu and then updating the list of devices in the app.

3. Method: Use of third-party applications (Bluetooth Router, AmpMe)

If the first two methods don't work, third-party utilities will come to the rescue.

• 🔄 Bluetooth Router - allows you to redirect the audio stream to multiple devices. MIUI 12+, It requires manual routing configuration.
• 🎵 AmpMe syncs music playback across multiple devices (including headphones) and works over Wi-Fi or Bluetooth, but requires registration.
• 🔊 Bose Connect – If you have Bose headphones, this app supports simultaneous connection to two sources.

Let’s take a look at the Bluetooth Router:

1. Install the app from Google Play.
2. Turn on Bluetooth and connect both pairs of headphones.
3. In Bluetooth Router, select Audio Router and add both devices to the list.
4. Start playing audio – the sound will be duplicated.

The downside is that there are possible delays (up to 0.5-1 seconds) and the need to keep the application active in the background, and some utilities (such as AmpMe) require an Internet connection to synchronize.

Charging both headphones > 50%|

Update MIUI to the latest version|

Disconnection of previously connected Bluetooth devices |

Compatibility check (Bluetooth 5.0+)

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Compatibility table of Xiaomi models with Dual Audio

Not all Xiaomi smartphones support two headphones at the same time, and the table below shows the data on popular models (relevant to MIUI 14 and HyperOS):

If your model is not in the table, check the specifications on the official Xiaomi website or in the documents to the device. Note: even if the smartphone supports Dual Audio, some headphones (especially budget) may not sync due to the limitations of the Bluetooth protocol.

Typical problems and their solutions

When connecting two headphones, users often encounter the following errors:

• 🔇 The sound is only going to one device, check if Dual Audio is activated in the Bluetooth settings. If so, restart your smartphone and reconnect.
• 🎵 Different volume on headphones - in SoundAssistant or settings MIUI adjust the balance manually.
• ⏱️ Latency – Try using headphones with support for aptX Low Latency or LC3.
• 🔌 Headphones are turned off arbitrarily - update the firmware of the headphones and smartphone, and reset Bluetooth settings (Settings) → Connections → Bluetooth → Three points. → Reset the settings).

If the problem persists, try the following:

1. Turn off battery optimization for Bluetooth applications in Settings → Apps → Permissions → Autostart.
2. Reset network settings (Settings → System → Reset → Network settings reset).
3. Check the headphones on another device - maybe the problem is in them.

⚠️ Note: On some models (e.g. Redmi Note 11 Pro), connecting two headphones at the same time can lead to increased battery consumption (up to 15-20% per hour.

How to check the quality of synchronization

After successfully connecting two headphones, it is recommended to test the stability of the connection.

1. Turn on a track with a clear bit (e.g. Test Tone – 440 Hz on YouTube).
2. Listen to the sound on both headphones – it should be synchronized, without echoes or delays.
3. Run the video and check if the sound matches the picture (latency should not exceed 100 ms).
4. Step away from your smartphone 5-10 meters – the connection should not be interrupted.

If the test fails (for example, the sound in the headphones diverges by 0.3-0.5 seconds), try:

• 🔄 Reconnect the headphones in reverse order (first the second pair, then the first one).
• 📵 Disable Wi-Fi – sometimes it interferes with Bluetooth.
• 🔋 Reboot both sets of headphones (on most Xiaomi models, you need to hold the button on the case for 10 seconds).

For accurate latency diagnosis, you can use applications like the Bluetooth Latency Tester (available on Google Play), the optimal latency for watching videos is up to 100 ms, for music - up to 150 ms.

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The best synchronization is achieved using headphones from the same manufacturer (for example, two pairs of Xiaomi Buds 4 Pro). Different models or brands may conflict due to differences in Bluetooth codecs.

Alternative solutions for older models

If your Xiaomi smartphone does not support Dual Audio either at the firmware level or through third-party apps, the following options remain:

• 🎧 Wired headphone splitter – if you have a smartphone with a 3.5 mm connector (e.g. Redmi) 9C), You can use a Y-shaped adapter to connect two pairs of wired headphones.
• 📡 Bluetooth transmitter – devices like Avantek APTX connect to the smartphone over the wire and broadcast the sound to two wireless headphones at the same time.
• 🔊 Smart speaker like hub – some speakers (like Xiaomi Mi Smart Speaker) can relay sound to multiple Bluetooth devices.

The downside of these solutions is the additional cost (from 500 to 3000 rubles) and the possible deterioration of sound quality, but for older models (for example, the Redmi 5 Plus or Mi A2) this is the only way to achieve the desired result.

⚠️ Note: When using a Bluetooth transmitter, pay attention to supported codecs. SBC, And your headphones support AAC or aptX, the sound will be transmitted in a degraded quality.

FAQ: Frequent questions about connecting two headphones