First appears in Siege of Dragonspear, this item can be imported into BG2EE, it's later found at Bridge District Shop.
In-game description Edit
|“|| Tangled Strings|
This cittern looks as if no bard could coax a tune from its crisscrossed and frayed strings. However, when played, the cittern gives off a sweet and clear tone. A clever bard can master the art of playing the tangled strings all at once, creating a jangling melody that listners find incredibly disruptive.