adding aria math as a music disc for completing all advancements

I think that the song Aria Math should be made into a music disc, but it should not be obtained like the other music discs in the game. Instead of just having to loot a structure or painstakingly trying for the 10th time to get a skeleton to shoot a creeper, it should be obtained by completing all advancements in Minecraft. This would make the player enjoy and learn about every aspect of the game, and it would also symbolize how far the player has come. For exactly how the player would get the item, I am not sure. maby it whould be given by putting it right into the players inventory, or something else. Anyway, I think it is a cool idea that should be considered.