Technical & Engineering
AES / EBU (AES3)
A professional digital audio transfer standard developed jointly by the Audio Engineering Society and the European Broadcasting Union.
What is AES / EBU (AES3)?
AES/EBU (formally AES3) is the workhorse digital audio interface of professional broadcast infrastructure. It carries two channels of uncompressed linear PCM audio over a single shielded cable, typically at sample rates of 44.1, 48, or 96 kHz. Every professional mixing console, digital tape machine, broadcast automation system, and transmitter chain supports AES3 natively — it is the lingua franca of the broadcast studio.
AES3's durability comes from its simplicity and ruggedness. The signal is self-clocking, tolerates long cable runs, and carries metadata in-band alongside the audio. Alternatives like MADI handle more channels but are used in multi-source scenarios; for stereo programme transfer — which is most of what a radio station actually does — AES3 has remained the default for over thirty years.
Why it matters
The absolute industry standard for passing high-quality, uncompressed digital audio between mixing consoles and broadcast transmission hardware.
Related terms
- Automation— Complex software and hardware ecosystems (e.
- EBU R128— The standardized loudness recommendation instituted by the European Broadcasting Union (EBU) to strictly normalize audio levels across platforms.
- HD Radio— The proprietary in-band on-channel (IBOC) digital radio standard utilized predominantly across North American markets.
- A-D Converter— Analog-to-Digital Converter; specialized hardware that translates continuous analog electrical signals into binary digital data (1s and 0s).