Introduction to Audio System Communication Interface Standards and Configurations


Audio signal transmission has been standardized at both the protocol and interface levels. This article explores commonly used analog and digital audio interfaces.  Please see below for an overview:


Inter-IC Audio Interfaces (Within Equipment)

Digital Audio Communication Standard/Protocol

2-Channel /Stereo Audio Interface

Multi-Channel Audio Interface

Advanced audio interface

Introductory Note: Some advanced audio interfaces simplify digital transmission by reducing the number of lanes to just two wires. This makes the hardware design more straightforward but necessitates a more complex audio hardware controller to manage the simplified lanes. 

Analog Interface

Inter-Board Audio Interfaces (Between Equipment)

Digital Audio 

Analog Interface

2. Balanced Voltage

Wireless Interface

Design analysis


Summary & Conclusion

Further Reading