SonicStage is a discontinued software product from Sony that is used for managing portable devices when they are plugged into a computer running Microsoft Windows. It comprises a music player and library manager, similar to iTunes, Windows Media Player and RealPlayer. It is used to manage the library of ATRAC (.omg and .oma) and MP3 recordings on a PC. SonicStage was required to transfer and manage music on all Network Walkman, NetMD and Hi-MD players, and the Clie handheld, before the product was dropped entirely outside of Japan in 2007.