Seeking a definition

By Elizabeth Quill, 10:00 AM July 29, 2010

Pitch is determined by a sound’s frequency. Notes that sit in different positions on a musical scale, called tones, have different pitches. Modern Western music, for example, combines 12 tones, with the A at the middle of a piano keyboard having a frequency of 440 hertz. Other cultures work with fewer tones. The first few notes of “Twinkle, Twinkle, Little Star” vary only in pitch.

Twinkle Twinkle Little Star

Click here to hear a middle A and here for the 12 tones used in Western music.

Rhythm emerges because d...

Source URL: