Is there a way to mute sound from one application on macOS?

I have a third party radio app that I listen to all the time. Then I want to visit a website which has sound (or a game).

Is there a way to mute sound from one application on macOS ?

Solution 1:

There's a nice open source app, BackgroundMusic, that provides for per app volume control in OSX10.10+:

Solution 2:

Finally something that works like in windows

Volume Mixer for Mac lives in your menu bar. With simple features like muting apps by double clicking and detaching an app from the master volume by right clicking, Volume Mixer is easy to learn and simple to use.

http://www.volumemixer-app.com/

Sadly not for free but it seems to have been harder work than you think, so support the devs!

Solution 3:

Audio Hijack Pro allows you to mute sound from any application. It is actually for recording an application, but you can mute applications as well. You can use the demo to just mute the sound. You shouldn't have to purchase a license.
Here's a screenshot. As you can see, the controls are at the top.