Simple Explanation

A system that lets you route any sound input to any output, or even combine them.

Concise Technical Definition

An audio routing system or device that allows flexible assignment of multiple inputs to multiple outputs, often with the ability to sum or mix signals.

Layman-Friendly Analogy

Like a switchboard where you can connect any phone line to any other—and even group calls together.

Industry Usage Summary

Found in mixing consoles, AV processors, and broadcast systems; matrix mixers enable custom zone feeds, foldback mixes, or routing of different inputs to multiple outputs.

Engineering Shortcut

Input-to-output router with summing capability.

Full Technical Explanation

A matrix in audio refers to a routing device or function—hardware or software—that allows any combination of inputs to be routed to any combination of outputs. Often used in live sound, broadcast, installations, and AV systems, a matrix can also sum (mix) multiple inputs before sending them to an output. Many digital mixers and processors include a matrix section to create custom mixes for zone distribution, recording feeds, or monitor outputs. Matrices can be simple 4x4 (4 inputs to 4 outputs), or complex 64x64 systems in digital audio networking.