Create a shadow queue so every listener hears the same track at the same position, then read back what is playing now and what is up next.

Create Shadow Queue

Create a shadow queue from a set of tracks. The queue schedules each track against wall-clock time, so every client that reads it lands on the same track at the same offset — that is what makes the listening session shared. The response is the queue ID, which is auto-filled into the steps below.