Sound plays simultaneously in headphones and speakers on Xiaomi: causes and solutions

Have you connected your headphones to a Xiaomi smartphone, but the sound keeps coming from the speakers? Or vice versa - after you turn off the headset, the audio is duplicated in both sources? This problem occurs on Redmi Note 10/11/12, POCO X3/X4, Mi 11/12 and other models of the brand. Most often, the fault is in the routing of sound, a polluted 3.5 mm connector (if any), or Bluetooth conflict devices.

In 80 percent of cases, you can fix the problem without going to the service center -- just reset the audio settings, clear the connector, or reconnect the headset. But if the sound is duplicated after the MIUI update, the cause may be a software bug that requires a firmware rollback or manual adjustment of configuration files. In this article, we'll look at all the working methods, from simple to advanced, including the developer's hidden settings.

Why is sound in headphones and speakers at the same time?

The sound duplication on Xiaomi is usually due to one of 5 reasons:

• 🔌 A polluted or damaged 3.5mm connector (relevant for models with audio jacks) dust, moisture or mechanical damage prevents the smartphone from correctly determining the connection of headphones.
• 📱 Failure in routing sound after update MIUI or custom firmware installations. Often found on the Redmi Note 10 Pro and POCO F3 post-update MIUI 14.
• 🔄 Bluetooth conflict: If multiple headsets were previously connected, the system may "forget" to turn off the sound in the speakers.
• 🛠️ Incorrect audio settings in the developer menu (for example, Dual Audio or Media Audio Routing mode is enabled).
• 🦠 Viral software or application conflict: Some applications (e.g. modified players) may force the sound to be duplicated.

On models without a 3.5 mm connector (for example, Xiaomi 13 or POCO F5), the problem is almost always due to software failures or Bluetooth, but on older devices (Redmi 4X, Mi A1), the physical connector is more often to blame.

⚠️ Note: If the sound is duplicated only in a particular app (like YouTube or Spotify), the problem may be in the settings of the app itself.

Method 1: Reboot and basic diagnostics

Before you dig deeper, follow simple steps:

1. Turn off the headphones (or Bluetooth headset) and restart the smartphone.
2. Wait 30 seconds after turning on – sometimes the system fixes the routing of the sound itself.
3. Reconnect the headphones and check the sound.

If the problem persists:

• 🔍 Check the headphones on another device – they may be the problem.
• 🎧 Try other headphones (preferably original or with Hi-Res Audio certification).
• 📱 Make sure that the smartphone is not stuck garbage in the connector 3.5 mm (light flashlight).

If the reboot didn’t help, move on to the next method.

Method 2: Cleaning of the 3.5 mm connector (for models with an audio connector)

A contaminated connector is one of the most common causes of duplication of sound.

1. Turn off your smartphone.
2. Take a toothpick or plastic card, wrap it in a soft cloth (such as a microfibre).
3. Carefully clean the inside of the connector of dust and debris.
4. To remove moisture (if the phone is wet) use silica gel (packages of shoe boxes) - put the smartphone in a sealed bag with silica gel for 12 hours.

If the connector is physically damaged (for example, bent contacts), you will need to replace the module in the service center, the average cost of repair for Xiaomi is from 800 to 1500 rubles.

Method 3: Resetting the sound and Bluetooth settings

If the problem is not the connector, try resetting the settings associated with the sound:

1. Go to Settings → Connections and Sharing → Bluetooth.
2. Click on the three dots in the top right corner and select Clear Cache.
3. Remove all saved Bluetooth devices (click on the gear next to each and select Forget the device).
4. Reboot your smartphone.

For resetting the routing of sound:

1. Open the Settings. → Sound and vibration.
2. Select Additional Settings (or Depending on the version of MIUI).
3. Click Reset the sound settings (if there is no such item, skip the step).

After reset, reconnect the headphones. If you use a Bluetooth headset, first turn on the pairing mode on it, and then connect through the Bluetooth menu on your smartphone.

Reconnect the headphones|Check the sound in speakers and headphones|Reboot your smartphone|Check the sound in different applications (music, video, calls)-->

Method 4: Developer settings (for advanced users)

There are parameters in the developer menu that affect the routing of sound.

1. Go to Settings. → The phone.
2. Click 7 times on the MIUI version until you become a developer!
3. Return to the main settings menu and open Additional settings → Developer settings.

In the developer menu, find and check the following parameters:

• 🔊 Turn off the absolute volume level – it should be turned off.
• 🎵 Routing audio through USB — install the car.
• 📱 Debugging by USB — Turn on (sometimes helps stabilize the sound).
• 🔄 Dual Audio (Bluetooth) – Disable if you don’t use two Bluetooth devices at the same time.

If you are not sure about changing the settings, take a screenshot of the current settings before editing.

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If after changes in the developer menu the sound is completely gone, return all parameters to the original state and restart the smartphone.

Method 5: Update or roll back firmware

If the problem occurred after the MIUI update, it may be the firmware bug.

1. Go to Settings → About the phone → System update.
2. If a new version of MIUI is available, install it.
3. If there are no updates, try manually downloading the latest stable firmware from the official Xiaomi website and installing it through System Update → Three dots → Select a firmware file.

If the bug appeared after the last update, you can try to roll back to the previous version.

1. Download the desired firmware version (for example, with Xiaomi Firmware Updater).
2. Rename the file to update.zip and place it in the root folder of the phone.
3. Go to System Update → Three Dots → Select a firmware file and select the downloaded file.

⚠️ Attention: Firmware rollback may cause data loss.Pre-backup through Settings → Additionally. → Backup and reset.

Method 6: Virus and Application Conflict Testing

Some applications (especially modified players or games) may interfere with the audio settings to check:

1. Install an antivirus (such as Malwarebytes or Dr.Web Light) and scan the system.
2. Go to Settings → Applications → Application Management.
3. Sort apps by installation date and remove suspicious ones (especially those that requested access to a microphone or speakers).
4. Clear the cache for Google Play Services, YouTube and your main player.

If the problem occurs after installing a particular application, try:

• 📱 Remove it and restart the smartphone.
• 🔄 Clear the application data (in the application settings, click Storage) → Clear the data).
• 🛡️ Check the permissions of the application (in the application settings, select Permissions and disable access to the microphone / speakers).

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If the sound is duplicated in only one app (like TikTok or Instagram), the problem is that app. Try updating the app or using its web version.

Method 7: Hardware diagnostics and service center

If none of these methods worked, the problem may be:

• 🔌 Damaged audio chip (often after falling or getting moisture).
• 📱 Faulty motherboard (for example, detached contacts).
• 🔋 Power problems (insufficient voltage on the audio module).

For diagnosis:

1. Make a backup copy of the data.
2. Reset your smartphone to factory settings (Settings → Additional → Backup and Reset → Reset settings).
3. If after the reset the problem remains, contact the service center Xiaomi. the average cost of diagnosis is 500-1000 rubles.

On the Redmi Note 8 Pro and POCO F1 models, a common problem is the MT6359 audio chip collapse after overheating, in which case the sound can disappear or be duplicated arbitrarily, and it costs 2,000-3500 rubles to repair such a chip.

FAQ: Frequent questions about sound duplication on Xiaomi