APTX in Xiaomi smartphones: what it is, how it works and why you need it

Have you ever noticed that when you connect your wireless headphones to Xiaomi, the mysterious APTX or APTX HD spelling appears in your Bluetooth settings? Or maybe your smartphone has suddenly started offering to choose "sound quality" when pairing with an audio device? If so, you've already encountered one of the key technologies that determines how good music will sound via Bluetooth. But what is it really, and why is it important to owners of Xiaomi, Redmi or POCO?

In this article, we will take a look at APTX in detail, from the technical basics to the practical application, which Xiaomi models support this codec, how to enable it (and whether to do so), and how it differs from the standard SBC or AAC. We will also touch on common myths — for example, whether APTX really gives “studio quality” or is just a marketing ploy. If you want to make the most of your smartphone sound, read on.

What is APTX: In simple words

APTX (Audio Processing Technology for Bluetooth) is an audio codec developed by Qualcomm specifically to deliver audio over Bluetooth with minimal quality loss. Unlike the standard SBC codec (which is used by default in most devices), APTX promises higher resolution, lower latency and better audio detail.

Simply put, it's like comparing MP3 to FLAC: both formats transmit music, but the second format retains more of the nuances of the original track. However, there's a caveat here: APTX only works if both the source (smartphone) and the receiver (earphones/column) support this codec, and if at least one of the devices doesn't "understand" it, the connection will automatically switch to SBC or AAC.

• 🎵 High sound quality: up to 16 bit/44.1 kHz (y APTX HD to 24 bit/48 kHz).
• ⚡ Low latency: about 30-40 ms (vs. 100-300 ms in SBC).
• 🔄 Adaptive bitrate: automatically adjusts to the communication conditions.
• 🔒 Licensing: The technology is owned by Qualcomm, so not all brands support it.

It's important to understand that APTX isn't a magic wand that will turn cheap headphones into premium ones, it just minimizes quality loss when you transmit over Bluetooth, and if your headphones sound bad initially, codec won't fix that.

What Xiaomi smartphones support APTX

Not all Xiaomi devices are APTX-enabled. This depends on two factors: the chipset (processor) and the Bluetooth version. Typically, the codec is available in models with Qualcomm Snapdragon processors (starting with the 400 series and above) and Bluetooth 5.0+. Here are the key series where APTX occurs most often:

To find out if your smartphone supports APTX, you can:

1. View the specifications on the official Xiaomi website (section "Bluetooth").
2. Connect compatible headphones and check your Bluetooth settings (more on this in the next section).
3. Use applications like Bluetooth Codec Info (available on Google Play).

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If your smartphone doesn’t support APTX, but you want to improve sound, try the LDAC codec (available in some Xiaomi models on Android 10+).It offers even higher resolution, but consumes more power.

How to enable and configure APTX on Xiaomi

If your smartphone supports APTX, you can activate it in a few steps. Importantly, both devices (smartphone and headphones/columns) must be compatible with the codec.

1. Connect the headphones to the smartphone via Bluetooth.
2. Open Settings → Connections → Bluetooth.
3. Find your audio device in the list and tap the ⚙️ (cog) icon next to it.
4. Select Sound Quality or Audio Codec (the name may vary depending on the version of MIUI).
5. In the list of available codecs, select APTX, APTX HD, or APTX Adaptive (if any).

If there is no sound quality, it can mean:

• 🔴 Your smartphone does not support APTX.
• 🔴 Headphones are not compatible with the codec.
• 🔴 Version MIUI is outdated (update firmware).

Some models (such as Xiaomi 13 Ultra) have an APTX Adaptive option available, which automatically switches between quality and low latency depending on the content (music, video, games).

APTX vs SBC vs AAC vs LDAC: Which is Best for Xiaomi?

The choice of codec depends on your priorities: sound quality, latency or battery savings.

What to choose?

• 🎮 For games: APTX Adaptive or APTX Low Latency.
• 🎧 For music: APTX HD or LDAC (if supported).
• 🔋 To save battery life: AAC or SBC.

Important: In practice, the difference between APTX and AAC may not be noticeable on budget headphones.Tests show that for most users, the quality gain from APTX HD is about 10-15% compared to AAC, but only when using high-quality audio devices.

Common APTX Problems and How to Solve Them

Even if your smartphone and headphones support APTX, there may be failures, and here are typical situations and ways to fix them:

⚠️ Warning: If the sound starts to break or disappears after the headphones are connected, try turning off APTX and switching to AAC. This may be due to interference in the 2.4 GHz band (e.g. from a Wi-Fi router).

• 🔌 Codec does not appear in settings: Update firmware MIUI Check the compatibility of the headphones (for example, Sony). WH-1000XM5 Or Soundcore Space. Q45 support APTX Adaptive. reset your Bluetooth settings (Settings) → Connections → Bluetooth → Additionally. → Reset the settings).
• 🎵 Sound distorts at high volume: Reduce bitrate in the codec settings (if you have one). Turn off functions like DSEE or EQ in the headphones.
• 🔋 Fast battery discharge: APTX Adaptive consumes more power than SBC Switch to AAC for savings.

If problems persist, try using the Developer Options app to force the codec to turn on (instruction below).

APTX and games: should you include for mobile gaming

For gamers, latency is a critical parameter. The standard SBC can delay up to 300 ms, which is noticeable in shooters or rhythm games. Here, APTX shows itself from the best side:

• 🎮 APTX Low Latency: ~30 ms latency (ideal for PUBG Mobile, Call of Duty).
• 🎧 APTX Adaptive: Automatically reduces latency in games.
• 🔊 SBC/AAC: 100+ms latency (may be critical in competitive games).

But there are nuances:

• Not all games support low latency, even with APTX (depending on the game engine).
• Some Xiaomi models (like the POCO F4 GT) have a separate Game Turbo mode that optimizes sound automatically.
• For maximum effect, use headphones with APTX LL support (for example, 1More SonoFlow).

Tests show that in games like Genshin Impact or Honkai: Star Rail, the difference between AAC and APTX is minimal, but in dynamic shooters like Free Fire, low latency gives a noticeable advantage.

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For gaming, APTX Low Latency or APTX Adaptive is more important than high resolution (APTX HD).

The future of APTX: what awaits the technology in the new smartphones Xiaomi

Qualcomm is actively developing the APTX line, and new Xiaomi smartphones are increasingly advanced versions of the codec:

• 🆕 APTX Lossless (up to 1 Mbit/s, 16 bit/44.1 kHz lossless) is already available on Xiaomi 14 Pro.
• 🎙️ APTX Voice for improved voice transmission (relevant for Bluetooth calls).
• 🔄 APTX Adaptive 2.0 is a dynamic switch between quality and latency in real time.

In 2026, Xiaomi also started integrating support. LE Audio (based on Bluetooth 5.2)+), which can be replaced over time APTX codec-driven LC3. But for now, APTX The standard for high-quality sound in the Xiaomi ecosystem.

Is it worth waiting for APTX in budget models? Unlikely: Qualcomm licenses the technology mainly for mid-range and premium chipsets, but flagships (such as Xiaomi 15, which is expected in 2026) can count on APTX Lossless and improved compatibility with audio devices.

FAQ: Frequent questions about APTX in Xiaomi