Not intended for musical purposes.
The item id for XMAS Chicken in unturned is 1708. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Useable: Consumeable
Size_X: 1
Size_Y: 1
Size_Z: 0.3
Use_Auto_Icon_Measurements: False
Food: 40
Water: 5
ConsumeAudioClip: Sounds/EatCrunchy.mp3