On a Mac, only Apple's own Music and TV apps can send audio to more than one AirPlay speaker. Everything else, Spotify, YouTube, a game, reaches one output at a time. Audiout removes that limit.
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Android home-screen widget for controlling Sonos speakers — play/pause, per-room volume, up to 5 favorites, TV mode detection, and a spinning laser-disc animation. $1.99 one-time, no subscription.
Tutti is a native macOS audio control center for managing multiple output devices at once. Play through several speakers or headphones simultaneously, adjust master and per-device volume, and control volume for individual apps on macOS 14.4 or later.
