OBS Studio Adds Audio Mixer And WebRTC Simulcast

OBS Studio released v32.1.0, adding a new Audio Mixer, WebRTC Simulcast support, undo/redo for scene item properties, and partial obs-websocket Canvas support. The update also changes default bitrates, improves browser-source security and plugin management, rearranges docks, and fixes numerous Linux, macOS, and encoder-related bugs, enhancing streaming quality, stability, and workflow for content creators.
Scoring Rationale
Official GitHub release adds practical features and fixes; however changes are incremental, limiting broad industry impact.
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