 Lyres from various times and places are sometimes regarded by organologists as a branch of the zither family, a general category that includes not only zithers, but many different stringed instruments, such as lutes, guitars, kantele, and psalteries.Others view the lyre and zither as being two separate classes.Those specialists maintain that the zither is distinguished by strings spread across all or most of its soundboard, or the top surface of its sound-chest, also called soundbox or resonator, as opposed to the lyre, whose strings emanate from a more or less common point off the soundboard, such as a tailpiece.