Engadget analysis: Bluetooth codecs, audio limits and the reality of lossless wireless

An Engadget article published on 15 August 2026 provides a technical examination of Bluetooth codecs, explaining how these compression and decompression methods dictate the audio quality delivered to headphones and speakers. The report notes that while Bluetooth is a ubiquitous technology, its underlying mechanics are often misunderstood by consumers seeking high-fidelity sound.

The article establishes that current Bluetooth technology caps data transfer at approximately 2 Mbps. This hardware limitation means that no Bluetooth device can currently handle true lossless audio without a simultaneous Wi-Fi connection, regardless of the codec employed. Consequently, wireless audio remains inherently compressed compared to wired or Wi-Fi-based alternatives.

Key technical metrics influencing sound quality include bit rate, audio bit depth and sample rate. Bit rate determines how much data is transmitted per second, directly affecting how much original audio quality is preserved. Bit depth impacts dynamic range, while sample rate, typically 44.1kHz in music production, defines how frequently audio snapshots are captured.

The standard codec, SBC, is included on every Bluetooth device. However, manufacturers often limit its bit rate to 256kbps to conserve battery life, despite a potential cap of 345kbps. Other codecs such as Sony’s LDAC and Samsung Scalable are proprietary and niche, while Qualcomm’s AptX family requires specific licensing for broader compatibility, including on personal computers.

Apple devices are restricted to supporting only AAC and SBC codecs. In contrast, Android users can manually select codecs via Developer options or third-party applications like Bluetooth Codec Changer by AmrG DEV. The Engadget piece advises that higher-quality codecs often use variable bit rates and may drain batteries faster, suggesting that users should balance audio fidelity against device longevity.