In this lesson we add two new words to our musical vocabulary: a Semitone (or ‘half-step’) and a Whole tone (or ‘whole step’).
These two words are used to describe the ‘distance‘, or ‘interval‘, between any two notes. The smallest interval possible is that between two notes which are immediately next to each other (no notes in between), and this interval is a called a semitone, or half step.
The interval between two notes that have a single note between them, for example C and D (with one black note between them) is two semitones (or two half-steps) which is that same as one whole tone. Thus “Two Halves Make A Whole” – get it?
Why do we need to measure intervals between notes? When be start playing multi-note chords, it is the intervals between the chord notes that DEFINE the chord type.