Jamie was practicing for his piano recital and always warmed up by playing scales. He started at the lower notes and practiced different patterns toward the higher notes before heading back down. As Jamie's fingers moved across the piano keys, the changed.

pitch

Explanation:

In music, the pitch is defined as the sound of the motes. The note lives on the staff provides the pitch. It is a perpetual property of a sound which allows an ordering of the frequency-related scale. Pitch is the quality of the sound which makes the music sounds 'higher' or 'lower' in terms of musical melodies.

There are 88 keys in a piano. And each key represents a different pitch or a different note.

In the context, Jamie is playing a piano and stared pressing the keys of the piano from the lower notes and then moving towards the higher notes before coming back down. And as Jamie is moving across the keys of the piano, the pitch of the piano is changing.

haile selassie i was the emperor of ethiopia from 1930-1974