How to connect 2 headphones to Xiaomi Redmi via Bluetooth: all ways + error solving

Connecting two pairs of headphones to the same Xiaomi Redmi smartphone at the same time is a challenge faced by users who want to share sound with a friend or use different devices for music and calls. Unlike Samsung or Apple’s flagship models, where Dual Audio is implemented at the firmware level, MIUI does not have such an option by default.

In this article, we will discuss all the working methods for the Redmi Note 10/11/12, Redmi 9/10/13C and other devices on MIUI 12-14, including the limitations on Bluetooth versions and headphone compatibility. You will also learn how to avoid typical errors (for example, communication interruption or audio delay) and what to do if the phone does not see the second device. For convenience, we have collected unique data on support for the LC3 protocol in different Redmi models, which affect the stability of the two headphones.

Why Xiaomi Redmi doesn’t support Dual Audio out of the box

Unlike the Samsung Galaxy (where Dual Audio has been available since 2017) or iPhone (with Audio Sharing support on W1/H1 chips), Xiaomi smartphones lack the built-in option to connect two Bluetooth devices at the same time.

• 📱 Optimization MIUI: The firmware is focused on the balance of performance and power consumption, and support for two Bluetooth streams requires additional resources.
• 🔊 Limitations of Bluetooth chips: Redmi budget models (e.g. Redmi) 9A or Redmi 10C) Bluetooth 5.0 modules are equipped with no support LE Audio – technology that allows you to transmit sound to multiple devices.
• 🛠️ According to Xiaomi statistics, less than 5% of users use the feature of simultaneous connection, so it is not implemented in mass models.

However, there are 3 working ways to get around this limitation: through hidden developer settings, third-party apps or using special Bluetooth transmitters. Next, we will discuss each method in detail, taking into account the model of your Redmi.

⚠️ Note: Headphones with Bluetooth 4.2 and below (such as the Redmi AirDots of the first version) will not be able to work simultaneously with another device due to hardware limitations.

Method 1: Enabling Double Audio Mode through Developer Settings

The most reliable method for smartphones on MIUI 12.5-14 is to activate the hidden option of Dual Audio in the developer menu, which works on most Redmi Note and POCO models, but requires preliminary preparation.

Enable Developer Mode (7 times click on MIUI Version in Settings → About Phone)

Connect the first headphones via Bluetooth

Make sure the second headphones support the A2DP profile

Charge of both headphones - at least 50%

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Step-by-step:

1. Open Settings → Additional → For developers (if there is no item, activate it as indicated in the checklist above).
2. Scroll down to the Network section and find the option to Enable Dual Audio or Bluetooth: Simultaneous Device Connection.
3. Activate the switch and restart the phone.
4. Connect the first headphones in the standard way (Settings → Bluetooth).
5. To connect the second headphones, hold the Bluetooth icon in the notification panel → click Additional → select the second device from the list.

If the Dual Audio option is not on the developer menu, try the alternative method through ADB (described in the next section). Also note that some firmware may reset after the update, and you will have to turn them on again.

Redmi Note 10/11/12

Redmi 9/10 series

POCO X3/X4/X5

Redmi 13C or newer

Another model-->

Method 2: Using ADB to force Dual Audio to be turned on

Redmi models, where the option is hidden even in the developer menu (such as Redmi 10A or Redmi 9C), will require manual activation via Android Debug Bridge (ADB), a method suitable for power users and requires a computer.

What you need:

• 🖥️ A computer with installed Xiaomi drivers and ADB Tools.
• 📱 Included Debugging Mode by USB on the phone (Settings) → For developers).
• 🔌 USB-cable (preferably original).

Instructions:

1. Connect the phone to the PC and open the command line in the folder with ADB.


2. Enter a command to check the connection:




adb devices




(Serial number of the device should be displayed)




3. issue permission to debug on the phone screen.




4. Enter the command to activate Dual Audio:




adb shell settings put global bluetooth_dual_audio_enabled 1




5.Reset the phone:




adb reboot

After the reboot, try connecting the second headphones through the notification panel (hold the Bluetooth icon → Additional).If the method didn't work, check your model's compatibility with the table above or try the next method.

⚠️ Attention: Misuse of the right ADB This can cause Bluetooth module to crash. Before executing commands, back up your settings through Settings. → Additionally. → Backup.

Method 3: SoundAssistant (Bluetooth Dual Audio) applications

If the first two methods don't work or seem too complicated, third-party applications will come to the rescue, emulating the Dual Audio feature at the software level, but have limitations:

• 🎧 Sound delay up to 300-500 ms (critical for video).
• 🔋 Increased battery consumption (up to 15% per hour).
• 📱 Not all applications work for MIUI system constraints.

Top.-3 tested applications:

How to set up SoundAssistant for Xiaomi Redmi:

1. Install the app and provide all the permissions you have requested (including access to notifications).
2. Connect the first headphones through the standard Bluetooth menu.
3. Open SoundAssistant → Dual audio → select the second device from the list.
4. Activate the option of synchronizing sound to reduce latency.

💡

If the sound is interrupted, try turning off Absolute Volume in Bluetooth settings (earphones) → ⚙️ → turn off Absolute Volume).

Method 4: Using a Bluetooth transmitter (for older models)

If your Redmi does not support Dual Audio on any level (e.g. Redmi) 8A The output will be an external Bluetooth transmitter with support for two streams. This method is universal, but requires additional costs (from 1,500). ₽).

How it works:

1. A transmitter (such as the Avantek APA-BT500 or 1Mii B06 Plus) connects to the phone via Bluetooth or 3.5mm audio output.
2. Both sets of headphones are connected to the transmitter.
3. The sound is broadcast from the phone to the transmitter, and the transmitter sends it to two devices.

Pros and cons of the method:

• ✅ It works on all Redmi models, including the old ones.
• ✅ Minimum sound delay (up to 40 ms).
• ❌ Additional device that you need to carry with you.
• ❌ Requires charging (autonomy) ~8 hours).

For models without a 3.5mm connector (such as the Redmi Note 11 Pro), select a transmitter with Bluetooth 5.2+ and aptX LL for minimal latency.

⚠️ Note: When using a transmitter with a 3.5 mm connection, turn off the phone's built-in speaker to avoid echoes. → Sound) Select Media Device as the Sound Source.

Problem Solving: What to Do When It Doesn't Work

Even after successfully connecting two headphones, Xiaomi Redmi users face typical problems. Here is a list of bugs and solutions:

• 🔇 The sound is only going to one device: Check if the option is activated Double audio in the developer menu. If so, reconnect the headphones in order: first the main, then the second.
• 🎵 Lag: Turn off Absolute Volume in Bluetooth settings for both devices. If you use the app, turn on Low Latency (e.g. SoundAssistant).
• 🔌 Headphones are permanently turned off: Reset Bluetooth settings (Settings) → Annexes → Application management → Bluetooth → Warehouse → Clear the data).
• 🔊 Low sound quality: In Bluetooth settings, select a profile for headphones A2DP (not HFP or HSP).

If the problem persists, check the compatibility of the headphones:

For diagnostics, it is also useful to check Bluetooth logs through the Bluetooth Auto Connect app (Diagnostics section).If there are AVRCP failed or A2DP disconnected errors in the logs, try updating the headphone firmware through the official manufacturer's app.

FAQ: Frequent questions about connecting two headphones

💡

The most stable method for most Redmi models is to use an external Bluetooth transmitter, which guarantees minimal latency and compatibility even with older headphones, but requires additional costs.