An instrument is a concrete or abstract tool intended for a purpose other than mechanical work, in particular a refined one.
Musical instruments are devices designed to produce music, frequently by plucking or striking a string or bell or drum surface, or by forcing air to resonate (see wind instruments).
... 417 families residing in the town. The population density is 129.8/km² (336.2/mi²). There are 519 housing units at an average density of 43.6/km² ...