Sound Bunny is one of them, an application that allows us to individually control the sound of each application . So regardless of the volume of our Mac, audio from Safari, iTunes or a notification from Mail will not play at the same volume.
We start the application and it automatically detects the applications we can modify . In the list will appear iTunes, the DVD player, VLC,… Now we can manually set a maximum volume for each of them. Is that all? Yes, nothing else. I’m telling you, it’s simple but useful. Especially if the notifications from applications like Mail or Safari when you open a web with music or some pop up with advertisements bother you when they sound the same or more than what you’re listening to in iTunes or Spotify.
The only snag I personally see is the price, $9.99. Each developer is free to set the price they feel is appropriate but taking into account the usage and type of user who might be interested in it makes it not a bestseller. Perhaps, opting for distribution on the Mac App Store at 0.79 or 2.39 euros could make the application more appealing . Likewise, for those who are interested and have ever thought about how to do something like this, you know, Sound Bunny.