Distribute music to rooms, control it with an app, group rooms and be woken up by music: That's Multiroom.
For us, Multiroom + means that Multiroom can talk to the house via KNX, that children's rooms can keep to sleeping times and that outdoor areas can never be switched on at night.
Or that the doorbell sound comes through the speakers, that the speakers can be adjusted in detail and adapted to the room and that some things simply run faster and more cleverly.
trivum has been producing multiroom systems for 20 years - and you can tell when you use them.