Run rule actions at the same time

[Wolfgang_S]

This sounds like you need a multiroom setup.
Searching for multiroom and sonos returns this thread not sure if that helps:

Sonos Multiroom rule for openHAB 3

Today I want to share my new Sonos multiroom rule that is made in the new openHAB 3 script language with great javascript support. Maybe some of you know maybe my old version of openHAB sonos multiroom but this was really ugly code. To the time where i wrote this, there was no javascript support available so I had to use the ugly lambda functions. Now on openHAB 3.0 i decided to make a new fresh version of the rule which uses the benefits of javascript. What does the rule: The rule can manage …