AAC nei dispositivi Bluetooth

As of 2025, AAC (Advanced Audio Coding) remains a widely supported Bluetooth audio codec, especially on Apple devices, and also supported on Android devices (Android 8 or later), though the overall Bluetooth audio landscape is evolving with the introduction of new, higher-quality codecs.

Key points on AAC Bluetooth in 2025:

• AAC is a lossy codec designed as a successor to MP3. It can handle up to 24-bit/44.1kHz audio at bitrates up to around 320 kbps, offering better sound quality than the basic SBC codec but not true lossless audio ^{[3] [4]}.
• Apple devices primarily use AAC as their default Bluetooth codec, and its implementation is optimized on iOS to maximize audio quality and battery efficiency ^{[3] [9]}.
• On Android, AAC is supported but its quality can vary depending on device and implementation. Improvements since earlier years have made AAC performance close to that of original FLAC files when properly implemented, though more advanced codecs like aptX Lossless, LDAC, and others are available on many Android devices for higher fidelity streaming ^{[2] [3]}.
• In 2025, new lossless Bluetooth audio options like aptX Lossless and LE Audio codecs are gaining traction and starting to replace older codecs in premium headphones, supporting CD-quality or better wireless audio. AAC does not provide lossless audio but remains widely compatible and a good option for many users ^{[1] [3]}.
• The current limitation is that Bluetooth transmission inherently involves compression, so even if streaming from a lossless source (like Apple Lossless ALAC), the audio is downsampled to AAC or another codec before transmission over Bluetooth ^[4].

In summary, AAC remains an important and broadly supported Bluetooth codec in 2025, especially on Apple devices, but it is not lossless. Emerging codecs like aptX Lossless and LDAC are leading the way toward true high-resolution wireless audio for compatible devices, mainly on Android and select headphones ^{[1] [3]}.