Spotify says users on iPhone will no longer be able to control the volume of connected devices using their physical volume buttons after Apple "discontinued" the technology that enables the functionality. The change impacts Spotify Connect, a feature that allows users to control Spotify playback on various devices like speakers, game consoles, and smart TVs.
"We've made requests to Apple to introduce a similar solution to what they offer users on HomePod and Apple TV for app developers who control non-Apple media devices," Spotify said in its update. "Apple has told us that they require apps to integrate into HomePod in order to access the technology that controls volume on iPhones."
Apple actually offers an API for third-party music services to stream directly to HomePods, but for whatever reason Spotify has chosen not to implement it. Fortunately, iPhone users running iOS 17 can still start an AirPlay session on HomePod using a Siri command (e.g. "Siri, play Fleetwood Mac on Spotify"). It's worth noting that this change only affects Spotify Connect on iOS. Spotify users controlling volume via Bluetooth or AirPlay will not be impacted.