aptX on Xiaomi smartphones: full support and settings

Wireless audio quality has long since ceased to be just a “pleasant bonus” and has become a critical parameter for millions of users choosing between different brands. When it comes to the bundle of smartphones and headphones, it is the Bluetooth codec used that determines whether you hear all the nuances of the composition or are content with a compressed, “metal” sound. In the ecosystem of Xiaomi, Redmi and POCO, the situation with support for advanced codecs such as aptX, aptX HD and LDAC, is heterogeneous and depends on the installed processor, Android version and regional firmware.

Many owners of the Chinese giant’s devices are unaware that their gadget is capable of transmitting high-resolution sound, since by default the system often chooses the basic SBC codec for maximum compatibility. Understanding which Xiaomi smartphones are technically equipped with Qualcomm chips with support for aptX, allows you to unlock the potential of audiophile headphones. In this article, we will examine in detail the lists of compatible models, methods of forced activation of hidden functions and the nuances of the sound path in the shell of MIUI and HyperOS.

It’s worth noting that having an aptX logo on your headphone box is only half the equation. A smartphone must also have the appropriate licensed chipset and software support. If one of the participants does not support high-quality codec, the connection automatically gets to the lowest common denominator, which is often the good old SBC or AAC. Let’s figure out how things are in the world of Xiaomi devices and what you need to do to improve the sound quality.

Bluetooth codec technology: what is hidden behind abbreviations

Before moving on to model lists, it is necessary to get a brief understanding of the terms, as marketing departments often mix the concepts of “high resolution” and “quality sound.” aptX is a proprietary codec developed by Qualcomm that provides audio stream compression without loss of quality noticeable on hearing, with bitrates of about 352 kbit / s. This is a significant step forward compared to the standard SBC, which often “cuts” high frequencies and narrows the stereobase.

More advanced versions, such as aptX HD and aptX Adaptive, offer even higher bitrates (up to 576 kbps and above) and better resistance to interference. However, the king (without losses) is often called the LDAC codec from Sony, which is capable of transmitting up to 990 kbps. Xiaomi devices with Qualcomm Snapdragon processors are traditionally good friends with the aptX family, while models on MediaTek can rely on LDAC or basic codecs, although this is changing with the release of new Dimensity chipsets.

⚠️ Note: Supporting an iron-level codec (Bluetooth chip) does not guarantee it will work if the software manufacturer (MIUI/HyperOS) blocked this feature at the driver level or did not obtain a license for a specific region.

The difference in sound between SBC and aptX HD can be huge, especially on high-quality acoustics. Dynamic range is getting wider, digital compression artifacts disappear, and instrument detailing is taking on a new level. For audiophile modes in streaming services like Tidal or Qobuz, having support for aptX HD or LDAC is a must.

• 🎧 SBC — basic codec, everywhere, but the sound quality is mediocre, high compression level.
• 🎵 AptX – a standard enhancement for Android, provides a good balance between quality and stability of the connection.
• 🎼 aptX HD — Audiophile version, supports 24-bit sound and bitrate for detailed sound.
• 📡 LDAC — Sony technology that transmits 3 times more data than standard Bluetooth, but can consume more battery.

List of Xiaomi smartphones with native support for aptX and aptX HD

The main factor determining the availability of aptX is the use of Qualcomm Snapdragon processors. Historically, Xiaomi's flagship and mid-budget lineups based on these chips receive full support for Qualcomm codecs. At the same time, budget models on MediaTek or older Snapdragon are often limited to the SBC/AAC bundle, although exceptions are increasingly common.

Since the Mi 6 and Mi Mix 2 era, Xiaomi has been embedding aptX HD support in its top devices, becoming the de facto standard for the Mi, Mi Note, and later for the Black Shark and POCO sub-brands. It is important to understand that global firmware versions (Global ROM) usually have all the necessary certificates, while the Chinese versions (CN ROM) may require additional customization or region change.

Below is a chart showing the evolution of codec support across different device series. Note that having aptX HD is often correlated with having a 3.5mm connector or supporting Hi-Res Audio over USB-C.

Special attention should be paid to gaming smartphones Black Shark (a subsidiary of Xiaomi), which has always been equipped with top-end codecs to minimize delays in games. Models like Black Shark 4 and 5 Pro support the full range of Qualcomm technologies, including aptX Low Latency, which is critical for synchronizing sound and pictures in shooters.

How to check and activate hidden codecs in MIUI and HyperOS

Sometimes a smartphone technically supports a codec, but by default it doesn't use it, preferring a more energy-efficient AAC or a compatible SBC. To check the current status of the connection and forced switch, you can use a hidden developer menu. This is a secure procedure that does not require root rights, but it allows you to manually select the priority codec.

To access the necessary settings, you need to activate the developer mode. Go to Settings → About phone and quickly click 7 times on the MIUI Version (or OS Version). After the notification “You became a developer” appears, go back to the main settings menu, select Additional → For developers. In this section, you need to find the Bluetooth subsection.

• 🔍 Find the Bluetooth Codec (Bluetooth Audio Codec).
• 🔄 Click on it and select from the list of available options (e.g. aptX) HD or LDAC).
• ⚙️ If the desired codec is inactive (gray), then the connected headphones do not support it or the driver is absent in the system.
• 📉 Pay attention to Bitrate - for aptX HD It must be at least 576 kbit/s.

⚠️ Warning: Forced codec installation that is not supported by headphones will cause the sound to simply disappear or the connection to break. Always check your headset specifications before changing these settings.

Newer versions of HyperOS may have slightly different interfaces, but the logic remains the same: If you only see SBC and AAC in the list of available codecs, and your Snapdragon processor, it is possible that the system codec files were deleted or corrupted during the update, in which case you may need to reset Bluetooth settings or flash the device to the global version of the software.

Compatibility issues: MediaTek vs. Qualcomm in Xiaomi devices

There has been a clear division for a long time: Qualcomm = aptX, MediaTek = only SBC/AAC. However, in 2023-2026 And in the years since, things have changed. MediaTek Dimensity's new chipsets have learned to codec. LDAC And even aptX (thanks to technology licensing), but the implementation of this in Xiaomi smartphones depends on the company's policy. Often in Redmi Note models on MediaTek you will not find aptX, but may be present. LDAC, Which is even better than standard aptX.

Users often wonder why the powerful Redmi Note 12 Pro+ (MediaTek) doesn’t have aptX, but there is LDAC. The answer lies in the licensing policy of Sony and Qualcomm. Xiaomi chooses a set of codecs depending on the target audience of the model. For gaming and media-oriented devices, the priority is given to maximum quality, even if it requires the use of different coding technologies.

If you own a MediaTek device and need aptX (like old Sony headphones that don’t support LDAC), it’s almost impossible to turn it on software. Bluetooth drivers in Android are closely integrated with the HAL (Hardware Abstraction Layer) processor, and “swapping” codecs here doesn’t work as easily as it does with missing features on Snapdragon.

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Use the Bluetooth Codec Changer app (requires root) to diagnose the codecs your smartphone supports in detail if the standard developer menu shows incomplete information.

The impact of Android and regional firmware on sound

The operating system version plays a key role in the availability of audio features. Since Android 10, support for high-resolution codecs has become the standard, but older versions (Android 8, 9) on Xiaomi devices may have experienced driver conflicts. Updating to the current HyperOS or MIUI 14 often “reveals” the hidden potential of the Bluetooth module, adding support for new versions of codecs.

Regional firmware binding is another important aspect: Chinese firmware (CN) versions may not have aptX HD certification for the European market, as licensing is done by region. When you install Global ROM (global firmware) on a Chinese Xiaomi smartphone, aptX support usually appears automatically if the hardware allows it. However, when you change the region in the settings (without flashing), codecs usually do not disappear, since the licenses are sewn deeper.

It is also worth mentioning the problem of “cut” sound in some versions of MIUI, where a system equalizer or features like Mi Sound can conflict with the work of aptX HD, switching the codec to a lower one for audio processing. Disabling all audio improvements in the Settings menu → Sound and vibration → Sound effects often help to return stable high bitrate operation.

⚠️ Warning: When flashing your smartphone from Chinese to global, make sure the bootloader is unlocked. Wrong firmware can lead to loss of DRM-This will not only affect the sound, but also the performance of Widevine. L1 (Netflix video quality).

Quality Comparison: Should You Pursue AptX HD?

The Audible Difference Between AptX and AptX HD (or LDAC) It's still debatable, whether it's urban noise, subway noise, or budget space. TWS-The difference in headphones can be minimal and noticeable only in individual tracks with a rich instrumental part, but when listening in silence on high-quality full-size headphones, the difference becomes obvious: “Air” appears, the scene is drawn better, the “sand” disappears at high frequencies.

For the average user listening to streaming music through Spotify (which compresses sound even in a premium tariff) or YouTube Music, having aptX HD may not give a wow effect. But for owners of local FLAC collections, Tidal HiFi users or Apple Music Lossless (when connected via DAC or over LDAC/aptX HD), supporting these codecs on Xiaomi smartphones is critical.

Also worth considering is power consumption. High-resolution audio transfer requires more Bluetooth module and processor resources, which can reduce headphone battery life by 10-15%. So if you listen to podcasts or audiobooks, it makes sense to manually switch the codec to SBC in the developer menu to save charge.

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Having aptX HD makes sense only when paired with quality headphones and a lossless sound source; otherwise, you won’t hear the difference, but you’ll spend more energy.

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