Soundless Background

This mod allows the user to mute Minecraft when it is in the background.

This option is configurable in multiple ways.

• Disable/Enable the functionality in the config (and mod options in-game)
• In the menu, Options -> Music and Sounds -> Music in Background

As of version 1.2 of this mod you are able to toggle individual sound categories.
This means that you can silence only the weather if you put Minecraft in the background. 

And as of version 1.3, you can partially silence individual sound categories.

Modpack Permissions:

You are free to include it in your modpack.