The X11 Audio Extension aims to provide audio support for the X Window System, in particular the X.Org reference implementation. Audio data can be directly routed through the X protocol so that remote applications can transparently play and capture audio across the network in the same way they can do graphics and mouse/keyboard user interaction. Applications with strict latency requirements can alternatively use shared memory. The extension provides hooks for an "audio compositing manager" that manages how multiple applications may simultaneously access the audio hardware (mix streams, mute some streams); it is the counterpart to the window manager.

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