How to change/edit music in Minecraft?

I'm playing the most recently updated Minecraft for pc and I'm curious has to how to edit music for a texture/resource pack that has already been made. I believe the pack is called Majora.zip. I wanted to add some cool Zelda music to it, but I'm having a hard time doing so. I have audacity installed as well as that default resource pack thing. If you could, please give me an well elaborated step by step process please!

Added (1). I would like to change the records as well as the background music

Added (2). I would like to change the records as well as the background music

Here you may get some help
http://bestwebpost.weebly.com

Well I'm sorry to say but you can't you can get a jukebox and a disk or turn down the music but. Other than that your stuck