Even in the stone age people made music. The first music was probably made trying to imitate sounds and rhythms that occurred naturally. Human music may echo these phenomena using patterns, repetition and tonality. This kind of music is still here today. Shamans sometimes imitate sounds that are heard in nature. It may also serve as entertainment (games), or have practical uses, like attracting animals when hunting.
Some animals also can use music. Songbirds use song to protect their territory, or to attract a mate. Monkeys have been seen beating hollow logs. This may, of course, also serve to defend the territory.
The first musical instrument used by humans was probably the voice. The human voice can make many different kinds of sounds. The larynx (voice box) is like a wind instrument.
The oldest known Neanderthal hyoid bone with the modern human form was found in 1983, indicating that the Neanderthals had language, because the hyoid supports the voice box in the human throat.
Most likely the first rhythm instruments or percussion instruments involved the clapping of hands, stones hit together, or other things that are useful to keep a beat. There are finds of this type that date back to the paleolithic. Some of these are ambiguous, as they can be used either as a tool or a musical instrument.