For example, in a woman with a 21-day cycle, the follicular phase is likely seven days; in a woman with a 35-day cycle, the follicular phase is likely twenty-one days. (Note: It is possible for a luteal phase defect to shorten the length of the menstrual cycle â this will be discussed in a future article on Phase II.
The diatonic scales. The diatonic scale is most familiar as the major scale or the natural minor scale (or aeolian mode). The diatonic scale is a very important scale. Out of all the possible seven note scales it has the highest number of consonant intervals, and the greatest number of major and minor triads.he diatonic scale is a very important scale. Out of all the possible seven note scales it has the highest number of consonant intervals, and the greatest number of major and minor triads.
(2.2) Intervals of the Major Scale. The Major scale is by far the most common scale in western music. When played in sequence, the notes of the Major scale make the famous do-re-mi-fa-so-la-ti-do sound. This characteristic sound of the Major scale is created by the pattern of intervals between its notes. There are seven notes in the Major scale and seven intervals between them. This pattern is: When this pattern is used to extract notes from the Chromatic scale, we arrive at the Major scale. Adding the semitone interval sizes together (2+2+1+2+2+2+1) gives a total of 12, the number of semitones in a octave. This is also true for every other (non-Major) scale type.