How to connect two headphones to the phone Xiaomi at the same time: all the ways

Connecting two pairs of headphones to the same Xiaomi smartphone at the same time is a challenge faced by users who want to share sound with each other, use different devices for the microphone and speakers, or simply test a new headset without turning off the old one. Unfortunately, the standard Bluetooth implementation in most Redmi, POCO and Mi models does not support the Dual Audio out of the box function as is done by competitors (for example, Samsung with Dual Audio or Apple with Audio Sharing).

In this article, we’ll break down 5 ways to connect two headphones to Xiaomi at the same time, including:

• 🔍 Activation of the hidden function of Dual Audio through the engineering menu (works on the computer). MIUI 12–14).
• 📱 Using third-party applications to separate the sound stream.
• 🔌 Hardware solutions: Bluetooth transmitters and audio splitters.
• 🎧 Connecting Wireless and Wireless Headphones at the Same Time.
• ⚙️ Customize the sound through ADB for advanced users.

It is important to consider that not all methods are universal – their performance depends on the smartphone model, the version of MIUI and the type of headphones. For example, Xiaomi 13/14 flagships with Bluetooth 5.3 have a better chance of successfully connecting than the budget Redmi Note 10 with Bluetooth 5.0.

1. Hidden Dual Audio function in MIUI: how to enable through the engineering menu

Some Xiaomi models based on MIUI 12-14 have a hidden option Dual Audio, which allows you to connect two Bluetooth devices simultaneously to play audio. This feature is not documented and may not be available on budget devices, but it is worth checking first.

To activate it:

1. Open the Phone app and enter the combination: ##36446337###
2. In the CIT menu, select Audio → Dual Audio.
3. Activate the Enable Dual Audio switch (if available).
4. Reboot your smartphone.

After the reboot, try connecting the second pair of headphones via Settings → Bluetooth. If the function works, the Bluetooth menu will appear the button Dual Audio.

Connect the first pair of headphones | Open the engineering menu (##36446337##) | Check for the option Dual Audio|Reboot the phone | Try connecting the second pair

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⚠️ Attention: On devices with MIUI 13/14 Bluetooth 5.2+ (for example, Xiaomi 12T, POCO F4) The chance of a successful connection is higher. on older models (for example, Redmi Note). 8 Pro) the option may be absent or may not work smoothly.

2. Sound sharing applications: SoundAssistant and others

If the engineering menu didn't work, you can use third-party apps that emulate the Dual Audio feature.

• 🎵 SoundAssistant (from Samsung, but it works for Xiaomi) – allows you to direct sound to two devices at the same time.
• 🔊 Bluetooth Dual Audio – a specialized application for stream sharing.
• 📱 Hear2 — Supports synchronization of sound between two headphones (including AirPods and other models).

Instructions for SoundAssistant:

1. Download the app from Google Play (or APKMirror if it’s not available in your area).
2. Connect both pairs of headphones through Settings → Bluetooth.
3. Open SoundAssistant, go to Additional → Double sound.
4. Select both devices from the list and activate synchronization.

Note that some applications may require permission to access notifications or special ADB rights to work properly, and audio delays (up to 0.5 seconds) due to software processing are also possible.

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If the sound in the headphones is not synchronized, try in the application settings to enable the option "Low Latency Mode" (if any).

3. Hardware solutions: Bluetooth transmitters and audio splitters

If the software methods don’t work, there’s a hardware workaround, such as using external Bluetooth transmitters or audio splitters, for users who need to use two pairs of headphones (for example, streaming or sharing music).

Device options:

How to connect with Avantek BTA-200:

1. Connect the transmitter to a 3.5mm connector or USB-C (depending on the model).
2. Activate the pairing mode on the transmitter (usually a long press on the power button).
3. Connect the first pair of headphones via Bluetooth to the transmitter.
4. Similarly, connect the second pair (some models support up to 2 devices at a time).

⚠️ Note: When using external transmitters, sound will only go through them - the built-in speaker of the smartphone will turn off. Also, interference is possible if other Bluetooth devices are working nearby (for example, Mi Band or wireless keyboard).

4. simultaneous connection of wired and wireless headphones

If you need to use wired and wireless headphones at the same time, you can combine connections through different interfaces, which works on all Xiaomi models, since it does not require special Bluetooth features.

Step-by-step:

1. Connect the wired headphones to the 3.5mm connector or through USB-C-adapter (if no connector exists).
2. Activate Bluetooth and connect wireless headphones.
3. In the sound settings (Settings → Sound), select Exit via both devices (if the option is available).
4. Start playing music or video – the sound will be duplicated on both devices.

This method is suitable for:

• 🎤 Use of wired headphones with microphone + wireless.
• 🎧 Listening to music via AirPods and recording voice through a wired microphone.
• 🎮 Game sessions, where you need both headphones and a headset for a discord.

5. Adjustment via ADB: for advanced users

If you're ready to work with an Android debugging bridge (ADB), you can manually activate support for multiple Bluetooth devices, which requires an unlocked bootloader and enabled USB debugging, but gives you more control over the system.

Instructions:

1. Install ADB Tools on your PC.
2. Connect Xiaomi to your computer and allow debugging (Settings → About Phone → MIUI Version → 7 times press to turn on Developer Mode, then Settings → Additional → For Developers → Debugging over USB).
3. Open the command line and type: adb shell settings put global bluetooth_dual_audio_enabled 1
4. Reboot your smartphone.

After that, the option of Dual Audio may appear in the Bluetooth settings. If not, try additional commands:

adb shell am start -n com.android.settings/.BluetoothSettings


adb shell input tap 500 1000 # (coordinates may vary)

⚠️ Attention: Misuse of the right ADB It can cause you to reset your settings or lose data.Before experimenting, make a backup through Settings. → System system → Backup.

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ADB-The method does not work on all Xiaomi models, but gives the most stable result on flagships (Xiaomi). 12/13/14, POCO F4/F5) with pure Android or global firmware.

6. Alternative methods: from screen mirroring to smart speakers

If none of the above methods worked, consider alternatives:

• 🔄 Mirroring sound on a smart speaker (e.g. Xiaomi Smart Speaker) + To do this, connect the speaker and headphones to one Bluetooth device (for example, a laptop) and stream the sound from your smartphone via Miracast or Google Cast.
• 📡 Use of the FM-transmitter (e.g. Nulaxy) KM18) transmitting sound to two devices via radio frequencies.
• 🎮 Connect via a game controller (e.g. Xiaomi Gamepad) if it supports audio output to multiple devices.

These methods are less convenient than direct connection, but they can help in emergency situations, for example, if you urgently need to show a movie to a friend, and only one set of wireless headphones is at hand.

FAQ: Frequent questions about connecting two headphones to Xiaomi