Bluetooth is poised to reach a major milestone in wireless audio transmission. On November 4, 2026, the Bluetooth Special Interest Group (SIG) officially announced the adoption of Bluetooth High Data Throughput (HDT), a technology capable of increasing the maximum data rate of Bluetooth Low Energy to 7.5 Mbit/s, up from the current 2 Mbit/s. This development opens up new possibilities for wireless headphones and earbuds, particularly with lossless audio transmission, high-resolution music, and spatial audio. What changes can we expect from this technology?
Bluetooth HDT: nearly four times the data throughput
Bluetooth High Data Throughput (HDT) represents a major evolution of Bluetooth Low Energy (LE), the low-power communication technology used in particular by wireless earbuds and connected devices. Integrated into the Bluetooth Core 7.0 specification, HDT introduces a new radio transmission method capable of reaching a theoretical maximum data rate of 7.5 Mbit/s, compared to the current 2 Mbit/s. This marks a significant advancement in the evolution of Bluetooth across its various generations.
This increase in speed makes it possible to transfer more data in less time. The Bluetooth SIG also highlights improved energy efficiency: by speeding up data exchanges, radio components can return to standby mode more quickly, thereby reducing their power consumption. This new technology also aims to improve the reliability of communications in complex radio environments.
HDT allows for several data rate levels – 2, 3, 4, 6 and 7.5 Mbit/s – in order to adapt the transmission to the connection conditions. The two highest data rates remain optional for manufacturers. The 7.5 Mbit/s limit refers to the gross transmission rate, while the actual bandwidth available for audio data will be lower.
Toward the widespread adoption of lossless Bluetooth audio
For music lovers, the main advantage of Bluetooth HDT lies in its ability to carry larger audio streams. By way of comparison, a CD-quality PCM stereo signal (16-bit/44.1 kHz) requires approximately 1.4 Mbit/s, while a high-resolution 24-bit/96 kHz stream requires approximately 4.6 Mbit/s without compression.
With its maximum theoretical bitrate of 7.5 Mbit/s, HDT could facilitate the transmission of lossless, high-resolution music. The Bluetooth SIG also envisions new possibilities for multichannel and spatial audio, with an update to the audio specifications expected in 2027. However, the actual quality achievable will depend on the codec used, the available data rate, and the characteristics of the devices.
Today, several technologies already meet the expectations of audiophiles. Sony’s LDAC, for example, enables the transmission of compressed high-resolution audio at up to 990 kbit/s, while Qualcomm’s aptX Lossless offers lossless transmission at CD quality in compatible conditions. Bluetooth HDT could pave the way for solutions based on a shared technical foundation, with greater bandwidth for future devices.
An evolution of Bluetooth LE Audio
Bluetooth HDT builds on Bluetooth LE Audio, a technology that has already revolutionised wireless listening through the LC3 codec, improved power management, and new audio-sharing features such as Auracast.
With HDT, this architecture offers superior transmission capacity. This advancement could, in particular, make it easier to diffuse more demanding audio streams while retaining the energy-efficiency benefits of Bluetooth Low Energy. The Bluetooth SIG is also exploring applications for extended reality headphones, smart glasses, and wireless devices that need to quickly exchange large amounts of data.
Bluetooth HDT: which devices will be compatible?
The adoption of Bluetooth HDT requires the integration of new radio components. Headphones, earbuds, and smartphones currently on the market will therefore retain their current transmission capabilities. To take advantage of HDT, both the transmitter and the receiver must have a compatible chip.
Another notable feature is that HDT is an optional feature of Bluetooth Core 7.0. Therefore, the mere mention of this version in a spec sheet will only indicate the Bluetooth generation being used. You’ll need to explicitly verify HDT support and the data rates specified by the manufacturer.
The first standardised audio applications using HDT are expected in 2027. This development should gradually encourage manufacturers of smartphones, headphones, and earbuds to incorporate new Bluetooth chips capable of supporting more demanding audio streams.
