Modern wireless headphones are capable of transmitting sound with a quality that until recently was only available to wired Hi-Fi solutions. The key role in this process is played by the algorithm used for compression and transmission of the audio stream. Among the many formats, it is codec — algorithm for compressing and transmitting an audio stream. Among the many formats LDAC from the company Sony considered one of the most advanced, providing data transmission at speeds of up to 990 kbps, which is three times higher than the SBC standard.
However, the presence of support for this codec in the characteristics of a smartphone or headphones does not guarantee its automatic activation. Often devices default to more stable but lower quality protocols to save power or ensure uninterrupted communications. To unlock the potential of your audio system, the user needs to manually change the parameters in the hidden menu of the system.
In this article we will analyze the activation process in detail LDAC, discuss the nuances of choosing the bitrate and find out why the connection may be interrupted at maximum settings. You will learn how to check the current connection status and what environmental factors affect the quality of wireless sound.
What is LDAC and why do you need it
LDAC is an audio encoding technology developed by the company Sony and implemented in the operating system Android starting with version 8.0 (Oreo). The main goal of this codec is to minimize quality loss when transmitting music via Bluetooth. Unlike standard SBC, which highly compresses the signal, LDAC preserves significantly more details of the original track, especially in the high-frequency range.
The technology supports three data transmission modes, allowing you to balance between sound quality and connection stability. The user can select sound quality priority, balance or stable connection priority. This makes the protocol a universal tool both for listening to studio recordings in a quiet room, and for use in urban transport conditions with a lot of radio interference.
To work, technology support is required on both sides: both on the transmitting device (smartphone) and on the receiving device (headphones or speaker). If one of the devices does not support LDAC, the connection will automatically fall back to the next available codec, for example aptX or AAC. You can check for support in the device specifications or through the engineering menu.
For maximum sound quality, use FLAC or WAV files. Compressed formats like MP3 128 kbps will not reveal the potential of the codec.
Checking device compatibility
Before delving into deep system settings, you need to make sure that your equipment is physically capable of working with this protocol. Not all smartphones have hardware support, even if the OS version is higher than version 8. Manufacturers of budget segments often disable this function at the driver level to reduce the cost of the license. Android have hardware support LDAC, even if the OS version is higher than the eighth. Manufacturers of budget segments often disable this function at the driver level to reduce the cost of the license.
The most reliable way to check is to use specialized applications from the store Google Play. Utilities like Bluetooth Codec Changer or Bluetooth Audio Codec Info read information directly from the Bluetooth chip and display a list of available codecs. If it is not in the list LDAC, software activation will not be possible without obtaining root access and replacing system files.
It is also worth paying attention to the version of the Bluetooth module. Although LDAC works on Bluetooth 4.2, for stable transmission of high bitrates, it is recommended to have a Bluetooth 5.0 module or higher. Older versions may not be able to cope with a bandwidth of 990 kbps, which will lead to constant connection interruptions.
- 📱 Check the smartphone specifications on the manufacturer's official website in the "Audio" or "Bluetooth" section.
- 🎧 Make sure that the headphones are certified to work with Hi-Res Audio Wireless.
- 🔍 Use diagnostic applications to view the list of active codecs in real time.
Activation through the developer menu
The main method for enabling an advanced codec is hidden in a special settings section intended for application developers. By default, this section is disabled to prevent regular users from accidentally changing critical system parameters. To access it, you will need to perform a simple sequence of actions in the menu Settings.
First, find the item About the phone or Phone information and open it. There you need to find the line Build number (Build Number). Click on this line quickly 7 times in a row. The system will ask for your PIN code or unlock pattern, after which a notification will appear indicating that you have become a developer.
Now return to the main settings menu. A new item will appear at the very bottom of the list or in the System section. Go inside and scroll down to the Network or Bluetooth section. There you will find the option For developers. Go inside and scroll down to the Network or Bluetooth section. There you will find the option Bluetooth audio codec. By clicking on it, you will see a list of available options, among which should be LDAC.
☑️ Activating developer mode
⚠️ Attention: Changing settings in the developer menu may affect the stability of other Bluetooth functions, such as a headset for calls. If, after turning on LDAC the microphone stops working in communication applications, return the codec settings to the "Default" value.
Setting the bitrate and transmission modes
After selecting the codec LDAC becomes active additional setting - Audio quality via Bluetooth LDAC. This is where the balance between audio detail and connection reliability is determined. Understanding the difference between the modes is critical for comfortable use.
The "Audio Quality Priority" mode sets the bitrate to 990 kbps. This is an ideal option for listening to music in a static position when the smartphone is lying next to the signal source. However, when going outside or in the subway, the signal may become unstable due to overload of the data transmission channel.
The "Stable connection priority" mode limits the bitrate to 330 kbps. The sound will be closer to quality aptX or good AAC, but the connection will become almost unbreakable even in conditions of strong radio interference. The intermediate option "Balanced" (660 kbps) is often the golden mean for most use scenarios.
| Operating mode | Bitrate (kbps) | Stability | Recommended use |
|---|---|---|---|
| Quality priority | 990 / 900 / 660 | Low | Home, quiet office, Hi-Res tracks |
| Balanced | 660 / 600 / 330 | Average | Walking, public transport |
| Connection priority | 330 | High | Sports, crowded places, calls |
Automatic bitrate selection allows the system to dynamically change sound quality depending on signal reception conditions, which is the most convenient option for most users.
Connection problems and solutions
Enabling LDAC at the maximum bitrate often leads to the music starting to stutter or be interrupted. This is not a defect in the device, but rather a physical limitation of Bluetooth bandwidth in a particular environment. The 2.4 GHz radio waves used by Bluetooth are highly susceptible to interference from Wi-Fi routers, microwaves and other gadgets.
If you encounter audio artifacts, first try reducing the bitrate manually through the developer menu. Switching to mode Balanced often completely eliminates the problem without any noticeable loss of quality to the untrained ear. Disabling the "Absolute Volume Level" function in the same developer menu also helps.
Sometimes the problem lies in the distance. LDAC requires a cleaner signal than SBC. Remove your smartphone from the back pocket of your jeans and place it in your chest pocket or in your hand. Obstacles such as the human body can shield the signal, causing packets of data loss.
Why is the sound interrupted in only one ear?
Most often, this indicates a synchronization problem between the right and left earbuds (TWS), rather than a codec problem. Try resetting the headphones to factory settings by holding the touch zones for a long time.
⚠️ Attention: When using LDAC headphone battery life may be reduced by 15-20% due to increased load on the decoding processor and increased radio traffic. Please take this into account when planning long trips.
Alternative methods and third-party applications
For users whose devices do not officially support LDAC, there are workarounds that require deeper intervention in the system. Third-party applications, such as Bluetooth Codec Changer, can forcefully activate hidden codecs if they are present in the chip drivers, but are blocked by the manufacturer at the software level.
The use of such utilities often requires granting special permissions through a computer with ADB (Android Debug Bridge) installed. The activation command may look complicated to a newbie, but it gives complete control over the audio stream. However, it is worth remembering that forcibly enabling an unsupported codec can lead to a complete absence of sound.
adb shell settings put global bluetooth_codec_ldac 1Another option is to install custom firmware (Custom ROM), such as LineageOS or Pixel Experience. They often unlock all audio codecs available on a given hardware, regardless of the manufacturer’s brand policy. This is a radical method that is suitable only for experienced users who are willing to risk the device's warranty.
- 🛠 To work with ADB, you need to enable "USB Debugging" in the developer menu.
- 📦 Make sure that ADB drivers for your smartphone model are installed on your computer.
- ⚡ Rebooting the Bluetooth stack through the app may be required after changing the codec settings.
Comparison with other high-definition codecs
Although LDAC is the most popular high-definition codec on Android, it is not the only one of its kind. Competing technologies such as aptX Adaptive from Qualcomm and LHDCoffer their advantages. aptX Adaptive is known for lower power consumption and better optimization for games due to reduced latency.
Unlike LDAC, which has fixed bitrate steps, aptX Adaptive dynamically changes the data rate from 279 to 420 kbps without dropping the connection, which provides a smoother transition between modes. However, at peak throughputs data-i="150">still outperforms the competition, delivering theoretically more accurate spectrum transfer. LDAC still outperforms competitors by delivering theoretically more accurate spectrum transmission.
Choice between codecs often dictated by the ecosystem. Owners of smartphones can get a better experience with smartphones, while users of smartphones are traditionally better optimized for smartphones. It is important to test different options on your specific set of equipment, since the implementation of the Bluetooth stack is different for everyone. Samsung or OnePlus can get better experience with aptX, while users Sony And Google Pixel traditionally better optimized for LDAC. It is important to test different options on your specific set of equipment, since the implementation of the Bluetooth stack is different for everyone.
If you use an iPhone, LDAC is not available to you. Apple uses its own AAC codec, which also provides high quality, but uses different compression algorithms.
Frequently asked questions (FAQ)
Does enabling LDAC affect the quality of voice calls?
No, the codec LDAC is used exclusively for transmitting media audio (music, video). For voice calls and microphone operation in instant messengers, the system automatically switches to codec CVSD or mSBCoptimized for speech. Enabling LDAC should not affect the intelligibility of the interlocutor's voice.
Why is there no LDAC item in the developer menu, although the headphones support it?
This means that the Bluetooth module of your smartphone does not support this codec at the hardware or driver level. It is impossible to add it programmatically without replacing system libraries (which requires root access). Try updating your phone's firmware to the latest available version.
Can I use LDAC when watching videos on YouTube?
Yes, you can. However, it is worth considering that a high audio bitrate in combination with a video stream can increase the load on the battery. In addition, some video players may not synchronize audio correctly when using maximum LDAC quality settings in poor signal conditions.
Does LDAC worsen Wi-Fi performance?
Since both Bluetooth and Wi-Fi (2.4 GHz band) operate in the same frequency spectrum, active transmission of large amounts of data through LDAC may interfere with the Wi-Fi connection, especially if the router is located next to the smartphone. In rare cases, this can reduce the download speed on the Internet.