It is a pain to change the music discs in "Minecraft" to play your own content. That doesn't mean it's impossible. If you really want to put in the time and effort, though, there is an officially supported way to pull it off. In June 2013, Mojang added support for Resource Packs that make it comparatively straightforward to edit details like music disc content. Note that these instructions will only apply to versions of the game released since then.
Things You'll Need
- Music (OGG format)
- A resource pack template (freely available through the "Minecraft" modding community)
- Minecraft Texture Ender
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.
Tips & Warnings
- Find your "Minecraft" app data directory by entering "%appdata%" from the Run dialog in Windows, opening the ".minecraft" hidden directory under Home in most Linux installations, or looking in the Application Support subsection of the Library folder under your username on a Mac.
- There is no real way to break your game using this method, but it is simple to create a Resource Pack that simply fails. There are still bugs being worked out and some music files seem to be incompatible at this time for unknown reasons. When in doubt, the officially supported community is your most useful resource.