snds = {};
game.DescendantAdded:connect(function(o)
    if o:isA("Sound") then
 	snds[#snds+1]=o;
    end
end)
function scan(p)
for _,v in pairs(p:GetChildren()) do
   if v:isA("Sound") then
   snds[#snds+1]=v;
   else scan(v)
   end
end
end
scan(Workspace);

while wait() do
   for _,v in pairs(snds) do
      v.Volume = 0;
   end
end