Choosing the right Bluetooth codec for Xiaomi headphones can dramatically change the quality of sound, from flat and distorted to voluminous and detailed. AAC, SBC, aptX LDAC, If even the instructions to the devices are often silent about their real differences? In this article, we will not only compare all the current codecs for models Xiaomi Buds 4 Pro, Redmi Buds 5, Xiaomi FlipBuds Pro and others, but also show how to forcefully switch between them, what hidden Android settings are responsible for this, and why sometimes even the top-end version of the codec is not the only one that can be used. LDAC Sounds worse than standard. AAC.
Spoiler: There's no universal "best" codec, it depends on your smartphone, Bluetooth (4.2 vs 5.3), headphone firmware, and even... device spacing. For example, aptX Adaptive is perfect for gaming on POCO F5, but useless if your Redmi Buds 3 Lite doesn't support it. We tested all the combinations and put together checklists that will save you hours of experimentation.
What are Bluetooth codecs and why they are important for Xiaomi headphones
The Bluetooth codec is an audio compression algorithm that determines how digital audio is transmitted wirelessly. Without the codec, headphones would have a raw data stream that takes up too much bandwidth and latency of 300 to 500 milliseconds, which is unacceptable for music and video. Codecs solve this problem by sacrificing some quality for speed.
Xiaomi headphones use 5 basic codecs:
- 🔹 SBC — basic, mandatory for all Bluetooth devices. MP3 192 kbps, but with artifacts at high frequencies.
- 🎵 AAC — Apple standard, but Android is supported. SBC Musical but sensitive to interference.
- ⚡ aptX is a codec from Qualcomm, optimized for low latency (ideal for gaming and video). Found in Xiaomi Buds 3 Pro and newer.
- 🎧 LDAC — Sony's flagship codec, transmits sound as close to CD (Up to 990 kbps. supported in Xiaomi FlipBuds Pro and Buds 4 Pro.
- 🔄 aptX Adaptive is a hybrid codec that automatically chooses between quality and latency.
A critical feature: Xiaomi often blocks support for some codecs at the firmware level, even if the headphone chipset supports them. For example, Redmi Buds 4 is technically capable of working with aptX, but in standard delivery this codec is disabled. It can only be activated through Developer Options (for more on how - read below).
Codec Comparison: A table of sound quality and compatibility
In order not to guess which codec is better for your model, we have collected data on all the current Xiaomi headphones (2022–2026 And their support for codecs. Note that even if the headphones support LDAC, Your smartphone may not be able to work with it (for example, Redmi Note). 11 limited SBC/AAC).
| Model headphones | SBC | AAC | aptX | LDAC | aptX Adaptive | Max. bitrate. |
|---|---|---|---|---|---|---|
| Xiaomi Buds 4 Pro | ✅ | ✅ | ✅ | ✅ | ✅ | 990 kbps (LDAC) |
| Redmi Buds 5 | ✅ | ✅ | ❌ | ❌ | ❌ | 320 kbps (AAC) |
| Xiaomi FlipBuds Pro | ✅ | ✅ | ✅ | ✅ | ❌ | 990 kbps (LDAC) |
| Redmi Buds 4 | ✅ | ✅ | ⚠️ (covertly) | ❌ | ❌ | 256 kbps (AAC) |
| Xiaomi Buds 3 Pro | ✅ | ✅ | ✅ | ❌ | ❌ | 352 kbps (aptX) |
⚠️ Note: If the table indicates «⚠️ (stealthy" means that the codec can only be activated through Developer Options or modified firmware. For example, the aptX in Redmi Buds 4 is enabled as follows:
- Activate Developer Mode (click 7 times on the Build Number in Settings → About Phone).
- Go to Settings → System → Developer Mode → Audio codec.
- Select aptX (if there is no option, your smartphone does not support codec).
💡
Before changing the codec, check the Bluetooth version on your smartphone in Settings → Bluetooth → Additional. LDAC requires Bluetooth 5.0+, for aptX Adaptive – 5.2+.
Which codec is best for music, games and calls?
The choice of codec depends on the use case. Here are some clear recommendations:
- 🎶 For music (Spotify, Apple Music, local files): LDAC (If supported, it is the best quality, but sensitive to interference. AAC — Universal choice for iPhone and Android. avoid SBC — he cuts high frequencies.
- 🎮 For games (PUBG, Genshin Impact, Call of Duty: aptX Adaptive or aptX Low Latency - Minimum latency (40-60 ms). If there is no aptX, use AAC (delay ~100-150 ms).
- 📞 For calls (WhatsApp, Telegram, regular calls): Any codec except LDAC — It is optimized for music, not voice. SBC or AAC It's the best fit.
🔍 Test in practice: We compared the sound of Xiaomi Buds 4 Pro with different codecs on the track "Bohemian Rhapsody" (FLAC, 24-bit/48kHz). Results:
- LDAC: Details at high frequencies (symbols, claps), but sometimes subside at low frequencies.
- aptX Adaptive: balanced sound, but a bit of dry vocals.
- AAC: Warm basses, but loss of instrumental parts.
- SBC: The sound is "flat" like from the 2010 phone speaker.
💡
For most users, AAC is the best balance between quality and compatibility. LDAC is only justified with flagship smartphones (e.g. Xiaomi 14 Ultra) and high-bitret tracks (Tidal, Qobuz).
How to Forcefully Change Bluetooth Codec to Android
By default, Android automatically selects the codec, but it can be changed manually.Instructions for Xiaomi/Redmi/POCO smartphones:
Activate the developer mode (7 taps on "Assembly Number")
Go to Settings → System → Developer Mode
Find Bluetooth Audio Codec (if not, your smartphone does not support manual switching)
Select the desired codec (e.g., aptX or LDAC)
Reconnect the headphones
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⚠️ Note: On some firmware (for example, MIUI 14 for Redmi Note 12) Bluetooth Audio Codec may not be available even after the developer mode is activated:
- Installation of a custom core (for example, FrancoKernel).
- Use applications like Bluetooth Codec Changer (require root).
- Update the firmware headphones through Mi Fit or Xiaomi Earbuds.
📌 Important: After changing the codec, check the stability of the connection, LDAC More than 5 meters from the smartphone can cause crackling or sound breaks:
- Switch to AAC or aptX.
- Make sure there are no obstacles (walls, metal objects) in the way of the signal.
- Turn off Bluetooth Absolute Volume in Settings → Sound.
What to do if the codec does not change?
Top.-3 The Myth of Bluetooth Codecs for Xiaomi
There's a lot of misconceptions about how codecs work on the Internet.
- Myth 1: «LDAC always better AAC». 🔹 Reality: LDAC transmits more data, but if the original track is compressed into MP3 128 kbps, it won't make a difference, and even on weaker smartphones (like Redmi). 9A) LDAC may cause lags due to lack of computing power for decoding.
- Myth 2: “AptX is only for gaming». 🔹 Reality: AptX not only improves latency, but also audio quality by compressing more efficiently. For example, on Xiaomi Buds 3 Pro, the difference between the two is the difference between the two. AAC And aptX is visible even in music - the bass gets deeper and the stage is wider.
- Myth 3: Codecs don’t affect autonomy». 🔹 Reality: The more complex the codec, the more power a Bluetooth chip uses, LDAC Redmi Buds 5 can reduce the operating time of 1-1.5 hours compared to the previous year SBC.
💡 Tip: To check which codec is currently in use, install the Bluetooth Codec Checker app (available on Google Play) that will show the current bitrate, latency and supported codecs.
What Xiaomi Headphones Support the Best Codecs (2026)
If you only choose headphones and want the highest sound quality, pay attention to these models:
- 🥇 Xiaomi Buds 4 Pro – flagship with support LDAC, aptX Adaptive and LC3 (new standard for Bluetooth LE Audio.Ideal for Xiaomi 13/14 series.
❌ Don’t buy if sound is important:
- Redmi Buds 4 Lite – SBC only, the quality of headphones for $ 10.
- Xiaomi Buds 3T Pro – Despite the name “Pro”, there is no LDAC or aptX.
📊 Price and Opportunity Comparison (June 2026):
| Model | Price (RF) | Best codec. | Autonomy (h) | For whom? |
|---|---|---|---|---|
| Xiaomi Buds 4 Pro | ~12 000 ₽ | LDAC | 9 | Melomancers, flagship owners |
| Redmi Buds 5 Pro | ~6 500 ₽ | aptX Adaptive | 10 | Gamers, travelers. |
| Xiaomi FlipBuds Pro | ~8 000 ₽ | LDAC | 7 | Lovers of unusual design |