Absolute volume Bluetooth on Xiaomi: how to turn it on and why you need it

You've connected a wireless headphone or speaker to a Xiaomi smartphone, but the sound is too quiet and then suddenly deafening? The fault is the Bluetooth absolute volume setting, which by default may not work correctly. This feature synchronizes the volume level between the phone and the connected device, but often requires manual tuning. In this article, we'll look at what absolute volume is, how to turn it on (or off) on different Xiaomi models, and why without it, sound can "jump" from quiet to loud.

The problem is especially relevant for owners of headphones Redmi AirDots, Xiaomi Buds or speakers Mi Portable Speaker. the fact that Android defaults to two modes of volume control: relative (where the adjustment is only on the side of the headphones) and absolute (where the smartphone dictates the volume level). If the function is turned off, when switching tracks or after a pause, the sound can be reset to a minimum or maximum. Next, detailed instructions with the features of the MIUI firmware and Android versions.

What is Bluetooth’s absolute volume and why you need it?

Absolute Volume is a Bluetooth protocol that synchronizes the volume level between the sound source (smartphone) and the receiver (earphones, speakers), without which volume control works on the principle of "double control":

  • 📱 Relative mode: The smartphone sends the headphones a command to "boost/lower volume," but the final level depends on the firmware of the headphones. This often leads to unstable sound.
  • 🔊 Absolute mode: the smartphone directly sets the volume level (for example, 70%), and the headphones execute the command without distortion.

In practice, the lack of synchronization manifests itself as follows:

  • 🎧 After a pause or switching track, the sound becomes quieter or louder.
  • 🔇 Volume slider on the phone does not correspond to the real level in headphones.
  • 🔄 When connected to another device, the volume is reset.

In MIUI firmware, the absolute volume function can be hidden or disabled by default, and some headphone models (such as the Xiaomi FlipBuds Pro) require additional settings in the Mi Bluetooth Audio app.

📊 What wireless headphones do you use?
Xiaomi Redmi AirDots
Xiaomi Buds/FlipBuds
Other Xiaomi headphones
Headphones from another brand
I don't use it.

How to check if the absolute volume is on Xiaomi

Before you turn on the function, make sure it's actually disabled. Here are two ways to diagnose:

  1. Visual check: 📲 Open the Settings. → Connections and sharing → Bluetooth. 🔍 Connect the headphones and pay attention to the volume slider: if it “jumps” when adjusting – the function is disabled.

The engineering menu (for advanced users):

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In the menu that opens, select Phone Information → Bluetooth and check the Absolute Volume enabled bar. If it is false, the function is disabled.

Note that some Xiaomi models (e.g. Redmi Note 10 Pro or POCO X3 Pro) may have their engineering menu blocked, in which case use alternative methods (see next section).

💡

If the audio automatically becomes very quiet after the headphones are connected, try manually turning up the volume on the headphones themselves (if there are physical buttons), a temporary solution before setting the absolute volume.

How to turn on absolute volume on Xiaomi

Depending on the MIUI version and the smartphone model, there are several ways to activate the function.

Method 1: Through Developer Settings

This is a versatile method that works on most Xiaomi devices with MIUI 12 and newer:

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

Open Settings → Additional → For Developers

Find the option to Turn off Bluetooth's absolute volume and turn it off (yes, this is not a typo - disabling the option includes the feature)

Reboot your smartphone and connect your headphones again-->

Important! Some firmware may call it Disable Bluetooth Absolute Volume, and if it's not available, try updating MIUI to the latest version or use the following method.

Method 2: Through the Mi Bluetooth Audio app

For Xiaomi headphones (such as Redmi AirDots 3 or Xiaomi Buds 4), the official app offers separate settings:

  1. 📱 Install Mi Bluetooth Audio from Google Play.
  2. 🔗 Put your headphones on the phone.
  3. 🎧 Open the app, select your headphones and go to Sound Settings. → Absolute volume.
  4. 🔘 Turn on the switch and save the settings.

If the app does not have this option, then your headphone model does not support software setting absolute volume, in which case only the first method or manual editing of system files (see method 3) will help.

Method 3: Through ADB (for power users)

If previous methods failed, you can enable the function via Android Debug Bridge (ADB), a method that requires a computer and basic command line knowledge.

Instructions:

  1. 💻 Install. ADB Tools on PC.
  2. 📱 On your smartphone, turn on debugging by USB developer-setting.
  3. 🔌 Connect your phone to your PC and execute the command: adb shell settings put global bluetooth_absolute_volume_enabled 1
  4. 🔄 Reset the device.

For MIUI 14 users, there is another life hack: in the audio settings (Settings → Sound and Vibration), you can turn on the Media Volume option by default. This will not replace absolute volume, but will help avoid sudden jumps in sound.

💡

If you often listen to music via Bluetooth in your car, turn off the absolute volume. Many tape recorders work better in relative mode, otherwise the sound can be distorted when you switch tracks.

❓ Why After Updating MIUI absolute volume dropped?
Firmware updates often reset the developer settings, including Absolute Volume. After the update: Re-enable developer mode. Check the status of the option to Turn off Bluetooth absolute volume (should be turned off). Reboot the device. If the problem recurs, use the method with ADB (see section above).
❓ Can I turn on absolute volume on Xiaomi without root?
Yes, all of the methods described in the article (developer settings, ADB, Mi Bluetooth Audio app) work without superuser rights. Root may only be needed for manual editing of system files (e.g. /system/build.prop), but this is risky and not recommended.
❓ Does absolute volume affect the sound quality?
No, it only synchronizes volume levels between devices. However, some headphones (such as those with aptX or LDAC support) may have short-term noise when the volume changes. If the sound quality deteriorates, try: Turn off absolute volume. In Bluetooth settings, select a different audio codec (such as AAC instead of SBC).
❓ Why some Xiaomi headphones don’t have the absolute volume option?
The manufacturer can block this feature for: Budget models (for example, Redmi AirDots first version), headphones with proprietary chips (for example, Xiaomi CyberDog Earbuds). Devices released before 2020 (Bluetooth 4.2). In such cases, it remains to use relative mode or alternative methods (see section “Alternative methods”).
❓ How to reset Bluetooth settings on Xiaomi if the sound is lost?
If, after manipulating the absolute volume, the sound has disappeared or become intermittent: Open Settings → Connections → Bluetooth. Press three dots in the upper right corner and select Clear Cache. Delete all paired devices (click on the gear next to the headphones → Forget). Reboot your smartphone and reconnect your headphones. If the problem persists, reset your network settings: Settings → About Phone → Reset settings → Wi-Fi, mobile network and Bluetooth settings.

If your question is not covered in FAQ, Check official Xiaomi forums (such as Mi Community) or contact support with the smartphone model and headphones. MIUI — This will help to diagnose the problem faster.