Music Disc

Music Discs (previously named Records) are items that can be played in jukeboxes. They play music made by C418; although, custom music can be added with the use of a resource pack.

Natural generation
The music discs "13" and "cat" are found in 8% of dungeon chests.

From Creepers
All music discs can be obtained by getting a creeper to be killed by a skeleton's arrow.

Console edition tutorial world
Music discs can be found in naturally generated chests in the console edition tutorial world.

Discs
''Please note, these tracks have been shortened to 30 seconds, due to an agreement with the author. This does not apply to "11".''

Raw music files
The 12 music tracks created for records by C418 can be found in:
 * Windows: %appdata%\.minecraft\assets\virtual\legacy\records (AppData is hidden by default, directory changed sometime with the new Mojang launcher (originally %appdata%\.minecraft\resources\streaming\))
 * Linux: ~/.minecraft/resources/streaming/ (.minecraft folder is hidden)
 * OSX: ~/Library/Application Support/minecraft/resources/streaming/ (~/Library is hidden in 10.7)

All music disk files are easily accessible in .ogg format.

Future
It has been stated that in the future, there will be 14 music discs to find in Minecraft, and the changelog for Beta 1.6 confirmed that the record player will support 'more than 15 songs.'

Trivia

 * One of the disc names, stal, is in Swedish; "stal" means "stole", but can also be "stål" without the ring diacritic, which means "steel".
 * Music disc "11", based on its data value, is the 11th disc in the game, is the only music disc that is shattered to pieces (this is why the end is static), lasts for 1 minute and 11 seconds, and outputs 11 when put in a comparator jukebox.
 * Chirp uses a sample from the Optigan disc "Bossa Nova Style" . It also sounds very similar to the song "The Orb Of Dreamers" from the PlayStation game series LittleBigPlanet, which also uses the sample. You can compare the two here.
 * In Console Edition, if you play the music disc "Cat", then after it is finished playing "Cat", it will play "Dog", which is a remix of Cat by C418 and is part of the Minecraft - Volume Alpha soundtrack album.