Customize the sound of Bluetooth headphones on Xiaomi: from connectivity to fine optimization

Wireless headphones have become an integral part of everyday life, but connecting them to Xiaomi smartphones often raises questions among users. Even after successful pairing, the sound can sound quiet, with delays or distortions. The problem lies not in the headphones themselves, but in the wrong settings of the phone or suboptimal Bluetooth connection parameters.

In this article, we will look at all the stages of setting up, from basic connection to fine calibration of the audio profile, you will learn how to choose the right Bluetooth codec, eliminate the audio delay when watching videos, adjust the equalizer to the genres of music and even solve problems with connection breaks. We will pay special attention to Xiaomi models 13/14 series, Redmi Note 12/13 and POCO F5/X5, where sound processing algorithms differ from budget devices.

Important: settings may vary depending on the version of MIUI (especially in MIUI 14+ firmware for both global and Chinese versions).

1. Basic Bluetooth headphone connection to Xiaomi

Before you can tune the sound, you need to pair the headphones with the phone correctly, and even this simple process has nuances that affect how the devices work.

On most Xiaomi models, the connection algorithm is the same, but there are differences for headphones with dual connection support (for example, Xiaomi Buds 4 Pro or Redmi Buds 5).

• 📱 Open the Settings. → Bluetooth and activate the switch.
• 🎧 Put the headphones in pairing mode (usually hold the power button). 3-5 seconds before flashing the indicator).
• 🔍 From the list of available devices, select the name of your headphones. If the name doesn't appear, update the list by pulling the screen down.
• ✅ Confirm pairing on both devices (sometimes input is required) PIN-code, by default 0000 or 1234).

After a successful Bluetooth connection, a Connected icon will appear next to the headphone name. If the headphones support a multi-point (simultaneous connection to two devices), MIUI 14+ will have an additional Connect to another device switch.

⚠️ Attention: On devices with MIUI for Russia (versions) RU) There may be no codec support LDAC Because of licensing restrictions, you'd have to flip it on to global or European firmware.

2. Choosing the optimal Bluetooth codec

One of the key parameters that affect sound quality is the Bluetooth codec, which determines how audio data is transmitted from the phone to the headphones. The following codecs are available in Xiaomi smartphones:

To change the codec on Xiaomi:

1. Connect the headphones and open the Settings → Bluetooth.
2. Press the badge. ⚙️ headphone-name.
3. Select Sound Quality or Audio Codec (depending on the MIUI version).
4. Set the priority codec. If it's not on the list, your model doesn't support it.

On devices with a Snapdragon 8 Gen 2 processor (Xiaomi 13/14 series), the LHDC codec provides a minimum audio delay of up to 20 ms, which is critical for mobile games and video watching.

3. Equalizer and sound effects setup

Even with the right codec, the sound can feel flat without customizing the equalizer. MIUI has a built-in tool for this, but its layout has changed in different versions:

• 🎛️ MIUI 12/13: Settings → Sound. → equalizer
• 🎛️ MIUI 14+: Settings → Additionally. → Sound effects
• 🎛️ For Xiaomi headphones: use the branded Mi Audio app (available on Google Play).

Recommended presets for different genres:

• 🎸 Rock/Metal: +4 db 100 Hz (bass), +2 db 3 kHz (medium), -1 db 8 kHz (upper)
• 🎤 Vocals/Pop: +3 dB per 250 Hz (lower average), +1 dB per 10 kHz (air)
• 🎧 Electronics: +5 dB by 60 Hz (subbass), +3 dB by 5 kHz (presence)

For fine-tuning, use manual mode and test tracks with a wide dynamic range (for example, "Bass I Love You" - 808 Bass Test or "Sweep Sine Wave"). The Mi Audio app also includes branded presets for Xiaomi Buds and Redmi Buds headphones.

⚠️ Attention: Excessive low frequency amplification (below 80 Hz) on cheap headphones can lead to distortion of the sound and even damage to the speakers. +6 dB.

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If the built-in equalizer doesn’t save settings, try third-party apps like Wavelet or Poweramp Equalizer, which support system integration on Xiaomi with root rights or through ADB.

4. Removal of sound delay (Audio Lag)

Sound delay is one of the most common problems with Bluetooth headphones, and on Xiaomi, it can be caused by:

• 🔄 A suboptimal codec (SBC delays up to 200 ms)
• 📱 Background optimization MIUI, audio-killing
• 🎮 Energy saving regime
• 🔊 Application conflicts (e.g. Dolby Atmos)

Ways to reduce delay:

1. Change the codec to aptX Low Latency, LHDC or LC3 (for MIUI 14+).
2. Turn off Dolby Atmos: Go to Settings → Sound → Sound effects and deactivate the option.

For gaming, latency can be reduced even more by using wired mode via a USB-C to 3.5mm adapter (such as the Xiaomi Type-C Earphone Adapter), in which case the lag is reduced to 5-10 ms.

5. Solving connection break problems

If the headphones are constantly turned off or the sound “breaks”, the problem may lie in:

• 📶 Interference from other wireless devices (Wi-Fi, microwaves)
• 🔋 Discharged headphone battery (below 15%)
• 📱 The outdated version of Bluetooth on your phone
• 🔄 Conflicts with other connected devices

Checklist for stable connection:

On devices with MIUI 14+, Bluetooth Priority has been introduced, which reduces interference with Wi-Fi.

1. Go to Settings → Connections and Sharing → Lab (hidden section).
2. Activate Bluetooth Coexistence or Bluetooth Priority.
3. Select High Performance Mode (increases battery consumption).

If the problem persists, try resetting your Bluetooth settings:

Settings → System → Advanced settings → Reset → Reset Bluetooth settings

6. Additional settings to improve sound

In addition to the basic parameters, Xiaomi has hidden features for audiophiles:

• 🎵 Mi Sound Enhancer (available on flagships): improves sound detail with hardware amplifier. Included in Settings → Additionally. → Sound effects → Improvement of sound.
• 🔊 Adaptive sound: automatically adjusts volume to the noise level. only works with Xiaomi and Redmi headphones.
• 🎧 Spatial sound: emulates surround sound (similar to Dolby Atmos, but without licensing restrictions).

For owners of Xiaomi 13 Ultra or Mix Fold 3, the “Hi-Res Audio Wireless” feature is available, which allows you to transmit sound in resolution up to 24 bits / 96 kHz over Bluetooth.

1. Connect headphones with support for LDAC or LHDC.
2. Go to Settings → About Phone and 5 times click on the MIUI Version to turn on Developer Mode.
3. Return to Settings → Additional → Developer options and find the option to Enable High-Resolution Audio over Bluetooth.

⚠️ Attention: Hi-Res Audio Wireless mode significantly increases battery consumption of both phone and headphones. Use it only when connected to charging.

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On devices with a Snapdragon 8 Gen 2 chip (Xiaomi 13/14 series), the audio delay when using the LHDC codec is only 20 ms – this is the best indicator among Android smartphones of 2023-2026.

7. Microphone setup in Bluetooth headphones

If you can't hear you in calls or voice chats, the problem may be the microphone settings. There are several ways Xiaomi can improve voice performance:

• 🎤 Choosing the microphone source: In some headphones (for example, Xiaomi Buds 4 Pro) you can choose which microphone to use - built into the headphones or phone).
• 🔇 Turning off noise cancellation: sometimes cVc algorithms degrade voice quality. Try turning it off in Bluetooth device settings.
• 📞 Regime. HD-Voice: Available in Settings → SIM-maps and mobile networks → HD-Voice only works with supported operators (MTS, Beeline, Tele2).

To test the microphone:

1. Open the Dictaphone app.
2. Start recording and speak into the headphone microphone.
3. Listen to the recording: If your voice sounds muted or jammed, try another microphone source.

On devices with MIUI 14+, the feature “Improving voice in real time” has appeared, which suppresses echo and background noise.

Settings → Applications → Permissions → Microphone → Improved voice

FAQ: Frequent questions about tuning Bluetooth headphones on Xiaomi