About the MetadataText Object

Some metadata attributes, such as WM/Lyrics_Synchronised, provide text accompanied by a description of the text. The MetadataText object provides a way to retrieve the text and the description separately. When you use Media.getItemInfoByType to retrieve information about complex textual attributes, you retrieve a MetadataText object that has properties, which contain the individual data.

MetadataText Object

Player Object Model for Scripting Languages