This is the official datapack used in Music SMP. It adds 31 music discs that when right clicked play a song and give an ability.

Get It Working

Do

/function musicsmp:init

to set the scoreboard values for each player. It should start working from there.

Command For Each Disc:

They have to be put into a command block to work

Update 1:

Harder, Better Faster, Stronger:

give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Harder, Better, Faster, Stronger",bold:true,italic:false,color:"aqua"},  minecraft:lore=[    {"text":"By: Daft Punk","italic":false,"color":"aqua"},    {"text":"Applies speed, haste, strength, and resistance.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"faster"},  minecraft:item_model="musicsmp:faster", ]

Final Countdown:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"The Final Countdown",bold:true,italic:false,color:"gold"},  minecraft:lore=[    {"text":"By: Europe","italic":false,"color":"gold"},    {"text":"Grants a temporary Clock that acts as a totem.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"final_countdown"},  minecraft:item_model="musicsmp:final_countdown"]

Free Bird:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Free Bird",bold:true,italic:false,color:"dark_red"},  minecraft:lore=[    {"text":"By: Lynyrd Skynyrd","italic":false,"color":"dark_red"},    {"text":"Grants a temporary Elytra and Fireworks.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"freebird"},  minecraft:item_model="musicsmp:freebird"]

Heavydirtysoul:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Heavydirtysoul",bold:true,italic:false,color:"red"},  minecraft:lore=[    {"text":"By: twenty one pilots","italic":false,"color":"red"},    {"text":"Grants strength and fire resistance.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"heavydirtysoul"},  minecraft:item_model="musicsmp:heavydirtysoul"]

Gangstas Paradise:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Gangsta's Paradise",bold:true,italic:false,color:"yellow"},  minecraft:lore=[    {"text":"By: Coolio","italic":false,"color":"yellow"},    {"text":"Grants temporary brass knuckles that give speed.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"paradise"},  minecraft:item_model="musicsmp:paradise"]

TNT:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"TNT",bold:true,italic:false,color:"red"},  minecraft:lore=[    {"text":"By: AC/DC","italic":false,"color":"red"},    {"text":"Spawns an explosion on all nearby entities.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"tnt"},  minecraft:item_model="musicsmp:tnt"]

Paranoid:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Paranoid",bold:true,italic:false,color:"dark_aqua"},  minecraft:lore=[    {"text":"By: Black Sabbath","italic":false,"color":"dark_aqua"},    {"text":"Summons a temporary NON-FRIENDLY warden.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"paranoid"},  minecraft:item_model="musicsmp:paranoid"]

Paralyzer:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Paralyzer",bold:true,italic:false,color:"dark_blue"},  minecraft:lore=[    {"text":"By: Finger 11","italic":false,"color":"dark_blue"},    {"text":"Applies slowness to all nearby players.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"paralyzer"},  minecraft:item_model="musicsmp:paralyzer"]

Born Survivor:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Born Survivor",bold:true,italic:false,color:"aqua"},  minecraft:lore=[    {"text":"By: Shirobon","italic":false,"color":"aqua"},    {"text":"Applies levitation and gives a temporary mace.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"bornsurvivor"},  minecraft:item_model="musicsmp:bornsurvivor"]

Gangnam Style:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Gangnam Style",bold:true,italic:false,color:"dark_green"},  minecraft:lore=[    {"text":"By: PSY","italic":false,"color":"dark_green"},    {"text":"Summons a circle of evoker fangs","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"gangnam"},  minecraft:item_model="musicsmp:gangnam"]

Macarena:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Macarena",bold:true,italic:false,color:"white"},  minecraft:lore=[    {"text":"By: Los Del Rio","italic":false,"color":"white"},    {"text":"Spawns lava on all nearby players.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"macarena"},  minecraft:item_model="musicsmp:macarena"]

Revenge:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Revenge",bold:true,italic:false,color:"dark_green"},  minecraft:lore=[    {"text":"By: CaptainSparklez","italic":false,"color":"dark_green"},    {"text":"Teleports all nearby players to user.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"revenge"},  minecraft:item_model="musicsmp:revenge"]

Thriller:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Thriller",bold:true,italic:false,color:"dark_gray"},  minecraft:lore=[    {"text":"By: Michael Jackson","italic":false,"color":"dark_gray"},    {"text":"Summons powerful zombies and applies invisibility.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"thriller"},  minecraft:item_model="musicsmp:thriller"]

Uptown Funk:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Uptown Funk",bold:true,italic:false,color:"light_purple"},  minecraft:lore=[    {"text":"By: Mark Ronson","italic":false,"color":"light_purple"},    {"text":"Gives all nearby players glowing.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"uptownfunk"},  minecraft:item_model="musicsmp:uptownfunk"]

House of Memories:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"House of Memories",bold:true,italic:false,color:"dark_blue"},  minecraft:lore=[    {"text":"By: Panic! at the Disco","italic":false,"color":"dark_blue"},    {"text":"Makes the user small.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"houseofmemories"},  minecraft:item_model="musicsmp:houseofmemories"]

Against the Tide:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Against the Tide",bold:true,italic:false,color:"aqua"},  minecraft:lore=[    {"text":"By: Sail North","italic":false,"color":"aqua"},    {"text":"Temporarily increases knockback.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"againstthetide"},  minecraft:item_model="musicsmp:againstthetide"]

Rapgod:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Rap God",bold:true,italic:false,color:"green"},  minecraft:lore=[    {"text":"By: Eminem","italic":false,"color":"green"},    {"text":"Grants invisibility and gives blindness to nearby players.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"rapgod"},  minecraft:item_model="musicsmp:rapgod"]

Fireball:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Fireball",bold:true,italic:false,color:"red"},  minecraft:lore=[    {"text":"By: Pitbull","italic":false,"color":"red"},    {"text":"Summons a ring of fire around the user and applies fire resistance.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"fireball"},  minecraft:item_model="musicsmp:fireball"]

Walk this Way:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Walk This Way",bold:true,italic:false,color:"gold"},  minecraft:lore=[    {"text":"By: Run DMC","italic":false,"color":"gold"},    {"text":"Gives a temporary 1-use shotgun.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"walkthisway"},  minecraft:item_model="musicsmp:walkthisway"]

No Sleep Till Brooklyn:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"No Sleep Till Brooklyn",bold:true,italic:false,color:"dark_gray"},  minecraft:lore=[    {"text":"By: Beastie Boys","italic":false,"color":"dark_gray"},    {"text":"Summons temporary friendly phantoms.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"brooklyn"},  minecraft:item_model="musicsmp:brooklyn"]

Billie Jean:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Billie Jean",bold:true,italic:false,color:"gold"},  minecraft:lore=[    {"text":"By: Michael Jackson","italic":false,"color":"gold"},    {"text":"Gives Moonwalk Boots and places wither roses","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"billiejean"},  minecraft:item_model="musicsmp:billiejean"]

Get Lucky:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Get Lucky",bold:true,italic:false,color:"gold"},  minecraft:lore=[    {"text":"By: Daft Punk, Pharrell Williams, Nile Rodgers","italic":false,"color":"gold"},    {"text":"Traps user in ice and heals them temporarily.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"getlucky"},  minecraft:item_model="musicsmp:getlucky"]

Enemy:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Enemy",bold:true,italic:false,color:"aqua"},  minecraft:lore=[    {"text":"By: Imagine Dragons, J.I.D.","italic":false,"color":"aqua"},    {"text":"Gives a temporary riptide trident and sets weather to rain.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"enemy"},  minecraft:item_model="musicsmp:enemy"]

Ride the Lightning:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Ride the Lightning",bold:true,italic:false,color:"yellow"},  minecraft:lore=[    {"text":"By: Metallica","italic":false,"color":"yellow"},    {"text":"Smites nearby players.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"lightning"},  minecraft:item_model="musicsmp:lightning"]

Rasputin:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Rasputin",bold:true,italic:false,color:"light_purple"},  minecraft:lore=[    {"text":"By: Boney M.","italic":false,"color":"light_purple"},    {"text":"Places slime below the player and obsidian above.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"rasputin"},  minecraft:item_model="musicsmp:rasputin"]

Update 2:

It's Going Down Now:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"It's Going Down Now",bold:true,italic:false,color:"blue"},  minecraft:lore=[    {"text":"Azumi Takahashi and Lotus Juice","italic":false,"color":"blue"},    {"text":"Gives temporary extra health and absorbtion.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"goingdown"},  minecraft:item_model="musicsmp:goingdown"]

My Way:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"My Way",bold:true,italic:false,color:"yellow"},  minecraft:lore=[    {"text":"Frank Sinatra","italic":false,"color":"yellow"},    {"text":"Largely increases knockback resistance.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"myway"},  minecraft:item_model="musicsmp:myway"]

Don't Stop 'Til You Get Enough:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Don't Stop 'Til You Get Enough",bold:true,italic:false,color:"dark_red"},  minecraft:lore=[    {"text":"Michael Jackson","italic":false,"color":"dark_red"},    {"text":"Increases movement, attack, and mining speed.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"dontstop"},  minecraft:item_model="musicsmp:dontstop"]

Don't Stop Me Now:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Don't Stop Me Now",bold:true,italic:false,color:"light_purple"},  minecraft:lore=[    {"text":"Queen","italic":false,"color":"light_purple"},    {"text":"Prevents fall damage and gives large jump boost.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"dontstopmenow"},  minecraft:item_model="musicsmp:dontstopmenow"]

I'm Still Standing:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"I'm Still Standing",bold:true,italic:false,color:"white"},  minecraft:lore=[    {"text":"Elton John","italic":false,"color":"white"},    {"text":"Gives a temporary thorns chestplate.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"stillstanding"},  minecraft:item_model="musicsmp:stillstanding"]

I Will Survive:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"I Will Survive",bold:true,italic:false,color:"red"},  minecraft:lore=[    {"text":"Demi Lovato","italic":false,"color":"red"},    {"text":"Summons a temporary horse.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"iwillsurvive"},  minecraft:item_model="musicsmp:iwillsurvive"]

Update 3:

Dream On:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Dream On",bold:true,italic:false,color:"dark_green"},  minecraft:lore=[    {"text":"Aerosmith","italic":false,"color":"dark_green"},    {"text":"Places webs around user, teleports them up, and gives slow falling.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"dreamon"},  minecraft:item_model="musicsmp:dreamon"]

Ordinary Life:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Ordinay Life",bold:true,italic:false,color:"gold"},  minecraft:lore=[    {"text":"Living Tombstone","italic":false,"color":"gold"},    {"text":"Summons a temporary flying boat.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"ordinarylife"},  minecraft:item_model="musicsmp:ordinarylife"]

Another One Bites the Dust:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Another One Bites the Dust",bold:true,italic:false,color:"yellow"},  minecraft:lore=[    {"text":"Queen","italic":false,"color":"yellow"},    {"text":"Gives a temporary spear.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"bitesdust"},  minecraft:item_model="musicsmp:bitesdust"]

Art of Guitar:

/give @p minecraft:carrot_on_a_stick[  minecraft:custom_name={text:"Art of Guitar",bold:true,italic:false,color:"red"},  minecraft:lore=[    {"text":"Marcin & RJ Pasin","italic":false,"color":"red"},    {"text":"Gives temporary music cookies.","italic":false,"color":"green"}  ],  minecraft:custom_data={song:"artofguitar"},  minecraft:item_model="musicsmp:artofguitar"]