A) Informal name for a digital audio standard established jointly by the Audio Engineering Society and European Broadcasting Union organizations. b) The serial transmission format standardised for professional digital audio signals (AES3-1992 AES Recommended practise for Digital Audio Engineering – Serial Transmission Format for Two-Channel Linearly Represented Digital Audio Data). c) A specification using time-division multiplex for data, and balanced line drivers to transmit two channels of digital audio data on a single twisted-pair cable using 3-pin (XLR) connectors.

Peak-to-peak values are between 3 and 1-V with driver and cable impedance specified as 110 ohms.