It seems integrating with Sonos will be easier in the future:
Quotes below from: https://www.sonos.com/nl-nl/newsroom/sonos-unveils-all-new-sonos-amp
Open Developer Platform and New Control APIs
Sonos has been a platform company since day one, with a goal of giving customers unparalleled freedom of choice, starting with an open approach to music services and expanding to support dozens of additional content and control partners, including multiple voice services.
Starting in early September, Sonos will further evolve the developer platform by fully opening up to all potential partners and will also add a new set of Control APIs, making it easier than ever to integrate Sonos into the smart home.
The platform will continue to expand with new APIs that allow partners to innovate on their integrations with Sonos. New Control APIs and features make the experience better for customers, especially those with integrated control systems, such as Control4 and Crestron.
- Line-in switching (for both analog and home theater), to allow for line-in components to be selected within the third-party control interface
- Volume pass-through for easier and more predictable volume control
- The ability to add Sonos playlists within a third-party interface
- In an early preview phase, capabilities to provide notifications and alerts from third-party devices, like a doorbell, through Sonos speakers
Sonos will invite partners to get certified and earn the “Works with Sonos” badge. The badge will signal to Sonos owners that companies building and innovating on our platform deliver experiences that meet the Sonos high bar for quality. For those interested in building on the Sonos platform, check out the developer portal.