Sonos announces Sonos 27, a major OS update delivering a refreshed app interface and deep AI integration. The company positions this as its most significant software release since the disastrous 2024 app update that led to CEO Patrick Spence's dismissal. The new platform allows users to connect "any outside AI assistant or agent," including ChatGPT, enabling control without interrupting current activities. Sonos hosts a public MCP server for AI discovery, allowing commands to play music, adjust volume, or move audio between speakers. Additionally, Sonos previewed Custom Agents, letting users create agents with specific models, personas, and voices. Beyond AI, the update introduces Sonos Fabric, a sensing capability that adapts speaker roles based on placement; for example, Move 2 speakers placed behind a couch automatically function as surround sound. The Ace Ultra headphones, launching September 29, feature headphone linking to send audio from speakers directly to the headphones. The redesigned app launches September 8 with persistent home, system, and search tabs, plus the ability to pin favorite speakers. Sonos also teased an updated voice assistant built for music and mood curation, though details remain sparse.

Key features include AI agent control, Fabric-based spatial adaptation, and a major app redesign. The update marks Sonos' effort to recover from past software failures and align with industry AI trends.