Things You'll Need
Instructions
Select your music, keeping in mind that you can only replace up to 12 music discs without installing third-party mod software. These files must be in OGG format to be compatible with the game. If you have music that is not in the proper format, there are plenty of free conversion utilities available online. They will generally all work equally well for this purpose.
Open your resource pack template folder. Navigate to the music disc directory. This directory is located at "[resource pack]/assets/minecraft/sound/records/." Place your music in this directory.
Rename each music file to replace the default tracks. The new music files must be renamed to exactly match the files they are replacing. Any difference in naming will result in your music not playing.
Run the Minecraft Texture Ender. When prompted, select the Resource Pack you have modified and click "Convert."
Copy the finished Resource Pack to your "Minecraft" appdata directory. Even if you have never used one of these before, there will be a folder called "resourcepacks" to drop it into.
Run "Minecraft" and open the Options menu. There will be a "Resource Packs" button at the bottom of the screen from which you can activate the pack you just installed. Enjoy your new tracks.