What are those strange sounds from the MacBook Pro?

Question

macbook

Two sounds:
1) Tinkling like a glass beaker
2) Tinkling like a slammed old cash register
The sounds are emitted by the system through the speakers themselves, I do not see any connection with any processes or actions. I work in the browser and iMovie.
What are these sounds? What are they talking about?

Answer 1

Maybe your mail client is configured in such a way that it makes a similar sound during synchronization. Well, one of the described sounds.

Answer 2

Put a little snitch on, look at what is surfing the Internet at the time of making sounds, with a high probability this is it (for example, it is synchronized).

Answer 3

Check, maybe what little thing got into the cooler, it happened to me and I went nuts

Answer 4

uh, what version of makosi? old messengers, it seems, just such sounds were made when online / offline.
iChat or something like that.