Function introduction:
The full name of LHDC is Low-Latency Hi-Definition Audio Codec, which is a high-quality Bluetooth codec developed under the A2DP Bluetooth protocol, which can provide better sound quality than ordinary Bluetooth audio transmission protocols.
Compared with traditional SBC audio transmission, LHDC allows a transmission speed of up to 900kbit/s, which is nearly three times that of traditional SBC;
LHDC can support the transmission of 23bit/96kHz streaming audio, and has become the second Bluetooth high-definition audio transmission protocol that has been certified by the Japanese Audiovisual Association Hi-Res Audio Wireless after Sony’s LDAC protocol.
Compared with the LDAC transmission mode, LHDC can output according to the original sampling rate, reducing the delay of the SRC process.
FAQ
Q：Which mobile phones currently support LHDC?
A: The pre-installed system version of Mi 9 Pro supports LHDC and can be used with headphones that support LHDC; as the MIUI version is updated, more models will be gradually supported in the future.
The first batch of Xiaomi/REDMI models that support LHDC in the future include: Mi 9, MIX 2S, MIX 3, Mi Note 3, Mi MAX 3 and other models will also be supported through system updates;
For more model support, it is recommended to follow the official announcement. For models of other brands, it is recommended that you contact the technical support personnel of the relevant brands for confirmation.
Q: After my mobile phone is updated, there is LHDC in the developer options, is it supported?
A: Hello, the switches in the MIUI system developer options are mainly used for debugging. The relevant options do not mean that the relevant functions are supported. The specific support situation suggests that you pay attention to the system version update log or the actual usage shall prevail.
Q: Why is LHDC selected in the Bluetooth audio codec of the developer option, but it is not LHDC when it is actually connected? Why did you go back after looking at this option after choosing?
A: Hello, the switches in the MIUI system developer options are mainly used for debugging. The relevant options do not mean that the relevant functions are supported.
If you still cannot connect after you choose, at least one of the mobile phone or the headset does not support the Bluetooth audio codec method you selected, it is recommended to confirm whether the headset supports;
Some models will be upgraded to support more advanced Bluetooth audio encoding through system updates. It is recommended that you follow the official update announcement.
Q: Will all phones after Xiaomi support LHDC?
A: Thank you for your interest in Xiaomi phones. The parameters of subsequent models are recommended to follow the official news, or the information on the product parameter page shall prevail.
Q: Both my mobile phone and headset support LHDC, how do I use it?
A: Xiaomi mobile phone will connect with high-quality audio protocol by default. If your Bluetooth headset and mobile phone support LHDC, you will see the "LHDC" logo on the Bluetooth interface of MIUI settings after connecting the headset;
Click the arrow on the right side of the audio device, you can also individually choose whether to connect this device with LHDC technology.
Q: Why does LHDC sound one card one card?
A: LHDC uses higher-bandwidth Bluetooth audio transmission. Due to the limitations of Bluetooth hardware, audio stuttering may be encountered in some scenarios, which may be more obvious in complex environments with severe Bluetooth signal interference;
At that time, you can temporarily turn off the LHDC function and use it in the appropriate scene as needed.
Supplement:
LHDC official website
https://www.lhdc-audio.org/
What is LHDC | LHDC
https://www.lhdc-audio.org/how-it-works
The full name of LHDC is Low-Latency Hi-Definition Audio Codec, which is a high-quality Bluetooth codec developed under the A2DP Bluetooth protocol, which can provide better sound quality than ordinary Bluetooth audio transmission protocols.
Compared with traditional SBC audio transmission, LHDC allows a transmission speed of up to 900kbit/s, which is nearly three times that of traditional SBC;
LHDC can support the transmission of 23bit/96kHz streaming audio, and has become the second Bluetooth high-definition audio transmission protocol that has been certified by the Japanese Audiovisual Association Hi-Res Audio Wireless after Sony’s LDAC protocol.
Compared with the LDAC transmission mode, LHDC can output according to the original sampling rate, reducing the delay of the SRC process.
FAQ
Q：Which mobile phones currently support LHDC?
A: The pre-installed system version of Mi 9 Pro supports LHDC and can be used with headphones that support LHDC; as the MIUI version is updated, more models will be gradually supported in the future.
The first batch of Xiaomi/REDMI models that support LHDC in the future include: Mi 9, MIX 2S, MIX 3, Mi Note 3, Mi MAX 3 and other models will also be supported through system updates;
For more model support, it is recommended to follow the official announcement. For models of other brands, it is recommended that you contact the technical support personnel of the relevant brands for confirmation.
Q: After my mobile phone is updated, there is LHDC in the developer options, is it supported?
A: Hello, the switches in the MIUI system developer options are mainly used for debugging. The relevant options do not mean that the relevant functions are supported. The specific support situation suggests that you pay attention to the system version update log or the actual usage shall prevail.
Q: Why is LHDC selected in the Bluetooth audio codec of the developer option, but it is not LHDC when it is actually connected? Why did you go back after looking at this option after choosing?
A: Hello, the switches in the MIUI system developer options are mainly used for debugging. The relevant options do not mean that the relevant functions are supported.
If you still cannot connect after you choose, at least one of the mobile phone or the headset does not support the Bluetooth audio codec method you selected, it is recommended to confirm whether the headset supports;
Some models will be upgraded to support more advanced Bluetooth audio encoding through system updates. It is recommended that you follow the official update announcement.
Q: Will all phones after Xiaomi support LHDC?
A: Thank you for your interest in Xiaomi phones. The parameters of subsequent models are recommended to follow the official news, or the information on the product parameter page shall prevail.
Q: Both my mobile phone and headset support LHDC, how do I use it?
A: Xiaomi mobile phone will connect with high-quality audio protocol by default. If your Bluetooth headset and mobile phone support LHDC, you will see the "LHDC" logo on the Bluetooth interface of MIUI settings after connecting the headset;
Click the arrow on the right side of the audio device, you can also individually choose whether to connect this device with LHDC technology.
Q: Why does LHDC sound one card one card?
A: LHDC uses higher-bandwidth Bluetooth audio transmission. Due to the limitations of Bluetooth hardware, audio stuttering may be encountered in some scenarios, which may be more obvious in complex environments with severe Bluetooth signal interference;
At that time, you can temporarily turn off the LHDC function and use it in the appropriate scene as needed.
Supplement:
LHDC official website
https://www.lhdc-audio.org/
What is LHDC | LHDC
https://www.lhdc-audio.org/how-it-works