Dear Apple sound is driving us crazy on our Macs

Dear Apple,

Please implement a system wide notifier that tells us where the music is coming from so that when music just starts playing, we can control the music, and keep working, playing and loving our Macs.

We have multiple apps and music players like Spotify, iTunes, Rdio… open at the same time.
We have multiple tabs in multiple browsers… open at the same time.

All of a sudden music starts playing on our Mac. Sometimes one song, sometimes many… at the same time.
We didn’t do it. it just happened.

We are confused, frustrated, embarrassed,
and we can’t find the source of the music…
It’s driving us nuts, our friends, partners, colleagues…