A simple resource pack that disables the background music on main menu (title screen).
Useful if you are doing something else while keeping Minecraft open in the background.
Technical details
The music is disabled using a file called sounds.json under Disable menu music.zip/assets/minecraft/ and the contents are as follows:
{ "music.menu": { "replace": true } }
You might notice that some parameters are missing, that's how it works - replace 4 files with nothing.
Used the wiki documentation.