I want to grab where I left off for the last video, for the fifth interval. From C to G sharp we have an interval with two names. It is either called an augmented fifth or perhaps a minor sixth. Most often will probably be referred to like a minor sixth, though there are times you’ll be able to call it an augmented fifth. What it is called is related to chords and just how they are created, that is a subject for one more day.
The next interval increasing the scale is relating to the C as well as the A. That would be the major sixth interval. Up to your A sharp we go to the minor seventh interval. The minor seventh is a crucial interval given it makes up the dominant seventh chord. What would be the dominant seventh? Well, from the key of C, the G chord accocunts for the dominant note (your fifth note with the key). It would like to push the ear time for the root, C. A G major triad, messed around with an added minor seventh interval pushes the ear even harder returning to the C. Back from the C major scale, the C to A sharp interval results in a C Dominate 7 chord. So within the key of F, in which the C could be the dominate note, adding that A sharp note, that minor seventh, to your C major triad will push your ear time for the F.
The final interval could be the major seventh. In the case of our C major scale, that is the B. The major seventh is a fairly jazzy sounding chord, recommendations what you are opting for. Of course, as soon as the major seventh you come time for the root note for the octave.
Now I want you to accomplish a simple exercise. Play each in the intervals so you’ll be able to see that this interval sounds. Really look closely at difference in pitch when you are from say, root to third and root to fifth, or root to second. The purpose of this workouts are to train your ear. Let’s say you take an easy melody like Twinkle Twinkle Little Star. If you learn to see intervals, then you will be able to observe that first spread to be a perfect fifth, the second as being a second above that perfect fifth. Now, not only will you play Twinkle Twinkle Little Star by ear, but you’ll be able to play it in almost any key you would like!
Now let’s get a few intervals on the less simple scale. We’ll use A major. If we play A to B, we all know it is a major second. Not just because we know the dimensions, and ways in which intervals correspond with that scale, but because could how the major second sounds. If we play A to A#, could it is a minor second because we understand how the minor second sounds.
This form of ear training needs time to work. It doesn’t come quickly, however, if you make it part of your daily practice routine, you may be surprised everything you begin to listen to when you hear music. You may even start to find yourself predicting when a melody goes, when you understand the inner workings of music.