pitch pipe: a small pipe sounding a tone of standard frequency; used to establish the starting pitch for unaccompanied singing
musical instrument: any of various devices or contrivances that can be used to produce musical tones or sounds
tarsier: nocturnal arboreal primate of Indonesia and the Philippines having huge eyes and digits ending in pads to facilitate climbing; the only primate that spurns all plant material as food living entirely on insects and small vertebrates