Songs = {"187031516","183824934","193840096","146048136","170698174","147788015","187743249","181046209","156439632","175091436","148416676"}
local player = script.Parent.Sound
local a = 100 --change this to how long you want each song to play (in seconds)
local maxvolume = 0.5 --change to how loud you want it to be, 0.5 is normal, but it can go up to 1
local shuffle = coroutine.create(function()
    while true do
        wait(1)
        choice = Songs[math.random(#Songs)]
        print(choice)
        player.SoundId = "http://www.roblox.com/asset/?id="..(choice)
        player:play()
        wait()
        player.Volume = 0
        while wait(0.1) do player.Volume = player.Volume + 0.01 if player.Volume >= maxvolume then break end end
        wait(a)
        while wait(0.1) do player.Volume = player.Volume - 0.01 if player.Volume <= 0 then player:Stop() break end end
        wait(1)
    end
end)

coroutine.resume(shuffle)