How do I get music to play?

Put a sound in a physical object in the world, then put a script anywhere and have it link to the sound (be sure you modify the volume and SoundID first):

sound = locationofsound --Change this to the sounds location (ex. game.Workspace.MusicBlock.Sound)
sound:Play()

http://wiki.roblox.com/index.php?title=Audio#Implementing_Audio

http://wiki.roblox.com/index.php?title=Music Set up the Sound and put it in Workspace then

sound = game.Workspace
num = 5 --Is changable
sound:Play()
wait(num)
sound:Stop()

function playMusic()
    if game.Workspace.Sound.IsPlaying == false then
        game.Workspace.Sound:Play()
    end
end
game.Players.PlayerAdded:connect(playMusic) 

Make this a model, also, name the music/song "Sound" and check the "looped" box.