Half step - The interval from one pitch to the immediately adjacent pitch, ascending or descending, e.g. c-c; e-e; b-c. The smallest interval on the keyboard.

Harmony - The sounding of two or more tones simultaneously; the vertical aspect of music.

Hemiola - The term applied to time values in the ration of 3:2, e.g. three half notes in place of two dotted half notes.

Homophony, Homophonic - Musical texture which is characterized by chordal support of a melodic line.