Onplayertouch>(Namebrickhere)>Setmusic>NONE
Onplayertouch>seteventenabled>(Whatever event number>disable
Onplayertouch>(Namebrickhere)>Setmusic>(Whatever song you want goes here)
That solves it?
You didn't understand the situation.
This is not possible because, as the above said, the whole deal is client-side.
You can use a really big delay for songs based on the song lenght then switch to the next but it's implied that absolutely everyone plays them at the same time.
Delay over 30s can be done with VCE events and relay, though it would be a forget to manage.