Universal Features:
-Music plays constantly with no silent periods.
-Door, Moog City, quinoxe, Chris, Excuse, Beginning, Droopy Likes Richochet, and Droopy Likes Your Face from Minecraft Volume Alpha have been added.
-Ki, Flake, Kyoto, and Intro from Minecraft Volume Beta have been added.
-Magnetic Circuit (calm4) from Java Edition Alpha v1.1.1 has been added.
-xmasn1, xmasn2, and xmas_the_end have been added.
-The "11" music disc has been replaced with Minecraft Volume Alpha's "Eleven", an actual song.
-The "ward" music disc has been replaced with Minecraft Volume Beta's "Ward", a remixed version of the original disc.
-Creative, Survival, Menu, and Water music play interchangeably.
-Nether Wastes, Crimson Forest, and Soul Sand Valley music play interchangeably with the original songs.
-Music plays in Warped Forests
-End and Boss play interchangeably.
-Dog plays after the Cat music disc.
-Jukebox music is audible from 250 blocks away instead of the default 64.
-All songs play at 0.5 volume.
-Songs and albums can be played in a music player in the settings screen.
-Up to 100 custom songs can be added. Requires the Custom Music Container companion pack.
-Any individual song can be played with the command "/playsound song.[song_name/filename] @s".
-Music discs will still play from the jukebox regardless of the pack option chosen below.

Pack Options:
Default - This is the normal setting of the pack with all the features listed above.
Native Music - This limits the music to songs that are in any base version of the game.
Festive Music - This limits the music to festive songs.
No Water Music - This is the exact same as Native Music, but without Axolotl, Dragon Fish, or Shuniji. Music still plays underwater, but the underwater songs will not be selected.
Old Music - This limits the music to songs from before the 2013 Music Update. It doesn't use Creative, Water, Nether, End, Credits, or Menu music.
Old Music+ - This is almost the same as Old Music, the difference being that it still uses Nether, End, and Credits music.
Custom Music - This limits the music to custom songs. If no custom songs have been added, it will be silent. Requires the Custom Music Container companion pack.
Total Mix - This lets any music, including Credits, End, Boss, Nether, Water, Menu, Survival, Creative, and Music Discs play at any time.
No Automatic Music - This stops music from playing automatically. It's meant for players who want to manually play songs with the music player or commands.