Halcyon – Au5 Roblox Id 286053351 Vote Up +0 Vote Down -1You already voted! This is the music code for Halcyon by Au5 and the song id is as mentioned above. Please give it a thumbs up if it worked for you and a thumbs down if its not working so that we can see if they have taken it down due to copyright issues. Tags: Halcyon - Au5 Roblox Id