When Sofia Hernandez-Williams of Holden plays the cello there is a mellowness ... her age — even if she's just playing while a photographer takes pictures of her at the end of a recent interview ...

Range A cello can play from a low C, two octaves below middle C, known as C2, up to a high A, two octaves above its highest string. Each of the four strings is tuned a fifth apart, making up the notes ...