Definitions for "Half step"
Keywords:  piano, semitone, fret, keyboard, octave
a unit used in music to describe the ratio in frequency between notes. Equal to 1/12 octave, the half step measures the difference between adjacent notes in the standard 12-tone scale, as on a piano keyboard. Two notes differ in frequency by a half step if the higher one has frequency equal to 21/12 = 1.0595 times the frequency of the lower one.
(semitone) The interval between any two adjacent notes on a keyboard; the smallest interval in common use in Western music.
A pitch difference which is the equivalent of that produced by two adjacent keys on a piano.
The pace used by a cellist when carrying his instrument.