Which period time marks the Paleolithic period?

roughly 2.5 million years ago to 10,000 B.C.

Explanation:

melody. a series of single tones which add up to a recognizable whole is called a what kind of layers of sound are heard melody or harmony. how many layers

pitch- the definition of pitch is as follows:

"the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone."