Google Pixel phones now support LHDC Bluetooth audio in Android 17 — here's what it means

At a glance:

• Android 17 introduces LHDC codec support for high-quality Bluetooth audio on Google Pixel devices
• LHDC offers variable bitrate options up to 1,000kbps with Hi-Res Audio Wireless certification from Japan Audio Society
• Requires compatible earbuds/headphones and manual configuration via Bluetooth Developer Settings

What is LHDC and why it matters

The Low Latency High-Definition Audio Codec (LHDC) has been promoted by the HWA Alliance since September 2018 as a high-quality Bluetooth audio solution. While not entirely new, its integration into Google's Pixel lineup via Android 17 marks a significant step for users seeking better wireless audio fidelity. LHDC joins established codecs like aptX Adaptive and LDAC in delivering Hi-Res audio over Bluetooth, certified by the Japan Audio Society in June 2024. However, it's important to note that LHDC is not lossless — it uses compression techniques to achieve high bitrates within Bluetooth's bandwidth constraints.

LHDC supports 24-bit/96kHz audio on Pixel devices, though other Android phones can reach 192kHz. The codec's variable bitrate ranges from 160kbps to 1,000kbps, adapting to connection quality. This flexibility ensures stable streaming in varied environments but means peak performance depends on ideal conditions. While 1,000kbps approaches the limits of Bluetooth reliability, LHDC's dynamic scaling prevents dropouts in congested radio spaces like subways or crowded offices.

Technical specifications and limitations

LHDC comes in four variants: LHDC-48K (16bit/48kHz ~400kbps), LHDC-96K (24bit/96kHz ~1000kbps), LHDC-192K (24bit/192kHz ~1000kbps), and LHDC-RAW (24bit/96kHz ~4600kbps). These specifications suggest high-end audio capabilities, but real-world performance hinges on Bluetooth connection stability. Even 1,000kbps falls short of raw 16-bit/44.1kHz stereo tracks (1,411kbps), making lossless transmission over Bluetooth unfeasible. The codec likely employs quantization noise shaping and sub-band compression to balance quality and bandwidth, though exact methods remain proprietary.

Despite Hi-Res certification, LHDC's effectiveness varies with hardware and environment. Radio congestion can reduce bitrates to 160kbps, potentially matching or underperforming standard codecs like AAC. This variability underscores the importance of testing specific device combinations, as performance isn't guaranteed across all setups. For audiophiles, LHDC offers a promising middle ground, but casual listeners may find minimal difference in everyday use.

How to enable and use LHDC on Pixel

To utilize LHDC, both your Pixel phone (running Android 17) and your earbuds/headphones must support the codec. Compatible devices include OnePlus Buds Pro series and Nothing Ear 2, though notably absent are Google's own Pixel Buds Pro 2. Access to LHDC requires navigating to Bluetooth Developer Settings, where users can manually select codecs and adjust sample rates. Most users will rely on Android's automatic codec selection, prioritizing the best available connection.

For optimal results, pair LHDC-compatible hardware with high-resolution audio files. On-device FLAC collections or Hi-Res streaming services (supporting 24-bit/96kHz or 192kHz) maximize the codec's potential. However, Pixel users are capped at 96kHz playback, even if their media supports higher rates. Lower-resolution files like CD-quality FLAC or high-bitrate AAC still benefit from LHDC's efficient transmission, avoiding unnecessary recompression.

Why it matters for Pixel users

LHDC support broadens the range of compatible audio devices for Pixel owners, aligning with existing high-quality codecs like LC3, aptX, and LDAC. While not revolutionary, this addition addresses long-standing demands for better Bluetooth audio on Google's flagship devices. Whether for casual listening or audiophile pursuits, LHDC enhances the wireless audio ecosystem without requiring hardware upgrades.

The update reflects Google's ongoing efforts to refine user experience through software improvements. As Bluetooth audio standards evolve, LHDC positions Pixel phones as competitive options for users prioritizing sound quality. However, the lack of LHDC support in Pixel Buds Pro 2 highlights potential gaps in Google's own hardware strategy, leaving users reliant on third-party accessories.

Looking ahead

LHDC's adoption in Android 17 signals growing industry recognition of Hi-Res wireless audio needs. Future updates may expand compatibility or improve compression algorithms, though current limitations remain tied to Bluetooth's inherent constraints. Users should weigh LHDC's benefits against existing codecs, particularly in environments where connection stability is paramount.

As more manufacturers embrace LHDC, the codec could become a standard feature across Android devices. For now, Pixel owners gain a valuable tool for enhancing their audio experience, provided they invest in compatible hardware and fine-tune their settings.