Automuter is a simple application that allows you to automatically mute your speakers during a specific time (e.g. at night), when your screensaver is running, or when your computer is locked. You can also set a hotkey to quickly mute your PC at any time. Useful if you keep your computer running 24/7 but don't want to be disturbed by sound notifications or other audible alerts at certain times.

The license of this software is Free Trial Software, the price is $9.99, you can free download and get a free trial.