SBC Codec: Fondamentale per Bluetooth

The SBC codec (Subband Coding or Low Complexity Subband Codec) remains, as of 2025, the default and mandatory Bluetooth audio codec used in the majority of wireless audio and telephony devices ^{[1] [2] [3]}. It provides universal compatibility, low processing demands, and is freely available, which ensures its continued prevalence in budget devices and legacy systems even as newer codecs emerge ^{[3] [4]}.

Key technical details for SBC in 2025:

• Bitrate: Typically 192–345 kbps (up to ~345 kbps in most devices) ^{[3] [4]}.
• Sampling rates: 16, 32, 44.1, and 48 kHz ^{[3] [4] [5]}.
• Mandatory for Bluetooth A2DP profile: All Bluetooth audio devices must support SBC under A2DP; it is the fallback when higher-end codecs are unavailable ^{[5] [9]}.
• Compression: SBC is lossy, so some fidelity is sacrificed for efficient transmission, but at its highest quality settings, it is close to CD-quality for most listeners, though audiophiles can notice differences with premium headphones ^{[2] [4] [5]}.

Future and 2025 status:

• While SBC is not being phased out in 2025, its role is now mostly focused on broad compatibility and entry-level audio. The introduction of LE Audio and the LC3 codec (Low Complexity Communication Codec) offers better efficiency, higher quality at lower bitrates, and more features, and is expected to become standard in new and premium Bluetooth devices ^{[1] [3] [5]}.
• LC3 adoption is accelerating, but SBC remains essential for ensuring interoperability, especially with legacy devices and lower-cost products ^[3].

Limitations in 2025:

• Does not support true high-resolution or lossless audio; limited to maximum 16-bit/48kHz and ~345 kbps ^{[3] [4] [5]}.
• Some latency, making it suboptimal for gaming or low-latency applications compared to modern alternatives ^[5].
• Compression artifacts and slight loss of detail can be apparent on high-end gear or at low bitpool (quality) settings ^[4].

Summary:
In 2025, SBC remains the foundational “universal” Bluetooth audio codec, mandatory for all devices, reliable for general use, but surpassed in fidelity and efficiency by emerging codecs like LC3 in the latest devices ^{[1] [3] [5]}. For most listeners and mainstream headphones, SBC provides satisfactory audio quality and wide compatibility, but those seeking superior audio will find better experiences using devices that support newer codecs.