In Lesson Fifteen a scale was defined as being a set pattern of notes, in alphabetical order, going from any note to its octave. The most common scale in music is called the major (or ionian) scale, which is identified by the familiar sound:
The C major scale can be written on the staff as such:
Each note of the scale can be identified by using Roman numerals. Thus F is said to be the 4th of the C scale, G is the 5th and so on.*
You will notice that between the 3rd-4th and the 7th-8th notes there is only a distance of one fret (i.e., a semitone, indicated by the curved line. All other notes are separated by one tone (2 frets). This pattern of notes and semitones remains the same for every major scale (which will be explored in more detail when other major scales are introduced.
* This Roman numeral representation can also be applied to chords and chord progressions.