Now we will learn about "key construction". Key construction in its most basic sense is simply to give a name to each one of the chromatics in any chosen key. Since there are twelve chromatics there will be twelve steps in key construction. These twelve steps must be memorized in order, and again there is no way around this. If you look closely at them, you will see a pattern in their order, and this makes them fairly easy to remember.
*note : if you do not know what an "interval" is, refer to the glossary for a definition of the term.
What we have here is a collection of intervals, each with their own name. Every chromatic note in the key we are in will have its own name as well as some type of designation as to what kind of note it is. You'll see that we have some major notes, some minor notes, two are called perfects, and we have one called diminished. The perfect 4th and the perfect 5th ARE major intervals.
The twelve intervals in key construction are as follows :
Root
Minor 2nd
Major 2nd
Minor 3rd
Major 3rd
Perfect 4th
Diminished 5th
Perfect 5th
Minor 6th
Major 6th
Minor 7th
Major 7th
Root (octave)
Once you have learned and memorized these twelve intervals in order we can look at what this means. The twelve steps of key construction will help us name any note in an octave that we may be talking about, and will show us where the Ionian mode (major scale) comes from.
In this lesson we will start to learn about the standard modes. These are the seven note scales that we learned and memorized the names of in a previous lesson. If you have not already completed the lessons preceding this one, you should do so before going into this lesson.
First, we will learn the mode called "ionian". This scale is very widely known as the "major scale". Most people already know a mode and they don't even know it, but if you have ever been taught or have heard the "do, re, mi, fa, so, la, ti, do" scale that they teach in most grade schools, then you have a head start.
The "Do, Re, Mi, Fa, So, La, Ti, Do" thing that you have probably heard in the past is actually the ionian mode. Notice it is a seven note scale, and if you are familiar with it, that it has a certain sound. This is a "major" scale and has the "major" sound. Very bright, happy, upbeat, sweet sounding, just the kind of scale you would want to use to write a pretty love song or a children's song. If that's not what you want to write, keep reading because this must be learned just the same.
Now, lets find out where this ionain mode comes from. You do remember your twelve steps of key construction right ? We can find the major scale (ionian mode) simply by using all of the "major intervals". This means that for whatever key we are in, if we use the root, major 2nd, major 3rd, perfect 4th, perfect 5th, major 6th, major 7th and then root again, we will get the ionian mode (the major scale). I will show a diagram here to show you.
Finding The Ionian Mode Using Key Construction :
Key Construction____________Major Intervals_________Ionian Mode
1. Root ~~~~~~~~~~~~~~~~~~~~~~~> Root ~~~~~~~~~~~~~~~> DO
2. Minor 2nd
3. Major 2nd ~~~~~~~~~~~~~~~~~~~> Major 2nd ~~~~~~~~~~~> RE
4. Minor 3rd
5. Major 3rd ~~~~~~~~~~~~~~~~~~~> Major 3rd ~~~~~~~~~~~~> MI
6. Perfect 4th ~~~~~~~~~~~~~~~~~~> Perfect 4th ~~~~~~~~~~~> FA
7. Diminished 5th
8. Perfect 5th ~~~~~~~~~~~~~~~~~~> Perfect 5th ~~~~~~~~~~~> SO
9. Minor 6th
10. Major 6th ~~~~~~~~~~~~~~~~~~~> Major 6th ~~~~~~~~~~~> LA
11. Minor 7th
12. Major 7th ~~~~~~~~~~~~~~~~~~~> Major 7th ~~~~~~~~~~~> TI
1. Root (octave) ~~~~~~~~~~~~~~~~~> Root ~~~~~~~~~~~~~~> DO
Notice that this shows us a pattern of intervals to arrive at the major scale or ionian mode. From the root to the major second was a "whole-step". Then we made another whole step to get to the major 3rd. But, from the major 3rd to the perfect 4th there was only a "half-step". If you follow this pattern you will see that to get the ionian scale or mode in any key, you would just apply the proper order of whole and half steps.
The order of intervals (steps) go like this :
Whole, Whole, Half, Whole, Whole, Whole, Half
*note : this is very important and must be learned
If you start on ANY note and move forward following this pattern of intervals, you will find the "ionian mode" (or the major scale) in your chosen key (the note you started on).
In the next lesson we will discuss more about this and actually try a few examples to show you how it works.
Now we are going to use what we learned in the previous lesson and find the ionian mode in any key we choose. If you did not complete the previous lesson then turn around and go there. This one will not do you any good unless you have already learned and memorized the previous lesson.
The first thing we will need to do is to choose a key for our scale. For simplicity in the first example we will use the key of A. So we are going to go ahead and write down all of the chromatics in the key of A. This means we will write out all 12 notes starting with A all the way to the next A.
A, A#, B, C, C#, D, D#, E, F, F#, G, G#, A
Now that we have our chromatics in the key of A, we will extract all of the major intervals from "key construction".
Finding The Ionian Mode Using Key Construction :
Chromatics____________Major Intervals_________Ionian Mode (key of A)
1. A ~~~~~~~~~~~~~~~~~~~~~> Root ~~~~~~~~~~~~~~~> A
2. A#
3. B ~~~~~~~~~~~~~~~~~~~> Major 2nd ~~~~~~~~~~~~~> B
4. C
5. C# ~~~~~~~~~~~~~~~~~~> Major 3rd ~~~~~~~~~~~~~> C#
6. D ~~~~~~~~~~~~~~~~~~~> Perfect 4th ~~~~~~~~~~~~> D
7. D#
8. E ~~~~~~~~~~~~~~~~~~~> Perfect 5th ~~~~~~~~~~~~> E
9. F
10. F# ~~~~~~~~~~~~~~~~~~> Major 6th ~~~~~~~~~~~~> F#
11. G
12. G# ~~~~~~~~~~~~~~~~~~> Major 7th ~~~~~~~~~~~~> G#
1. A (octave) ~~~~~~~~~~~~~~~> Root ~~~~~~~~~~~~~~> A
What we did here was to use all of the major intervals from key construction and applied them to an actual set of chromatics (key of A in this case). We could have used the chromatics in any key and this would still work the same. If our chromatics started with F and went to the next F at octave, the same intervals would have given us all the right notes for F ionian (major).
Again, since these are the steps key construction tells us we have to use to arrive at all the major intervals, we found this scale using this interval formula :
Whole, Whole, Half, Whole, Whole, Whole, Half
So by simply taking the chromatics in any key you choose and applying the W,W,H,W,W,W,H intervals you can find the major scale in any key. I would like you to try some on your own now and see how you do. I will give you the answers to a couple of them so that you can check your work. If you get both of these two correct on your own then your are doing it correctly and should be able to find all 12 without trouble.
F# ionian F#, G#, A#, B, C#, D#, F, F#
C ionian C, D, E, F, G, A, B, C
Once you have figured all this out we can go on to learning about the other modes. Make sure that you understand this and can find the scale successfully in any key. Check yourself by comparing your answers to the two I have posted above. Since there are only twelve different notes in all, there are only 12 possible ionian scales you could find. You should have no problem finding all of them using this technique.