However, a change occurred in late 2023 when a California judge overturned the jury verdict that had favored Sonos. Google responded by promptly restoring the ability to add Nest devices to multiple speaker groups. Despite this, the volume control function remained disabled on Pixel phones until now.
With the arrival of Android 15 Beta 2, this functionality has finally been restored. According to the source, Google had introduced a flag named config_volumeAdjustmentForRemoteGroupSessions in 2021, which controlled platform-level volume adjustments for grouped devices. While this flag was enabled by default in the Android Open Source Project (AOSP), it was overridden for Pixel devices. This has now been reversed in the Android 15 Beta 2 builds for Pixel phones, bringing back the speaker group volume controls.
Cast volume controls on a speaker group (Pixel running Android 15 Beta 2.1)
Though this is a welcome change for Pixel users, there is one casting-related feature that remains missing: stream expansion. This allows users to add more devices to the cast by using the media output switcher. While this feature is available on several non-Pixel devices, it is not yet present on Pixel phones, even those running Android 15 Beta 2. The return of this function is anticipated, but the timeline remains uncertain.