It took them awhile (Or we just haven't found the others...) but [i]Bungie has done it again.[/i] The Siege of Madrigal can be heard ("rock" style but with the original piano) in the tower, and very easily. I haven't seen much talk about it, but down in the ship under the hangar (I call it the "bar", the only area that seems to have no purpose other than Xur) recently had a music feature added to it. The large white circular panel on the left side can be approached and displays a "Play Music" option, and will play various tracks that last 10-20 seconds. If activated enough times, it will play the Siege of Madrigal! - The Captain