Quote:
Originally Posted by luderart
Welcome back!
First let me close the file of the old lessons by giving my answers to the last lesson:
A) (No. 2) D diminished chord: You said I had missed vii in Eb minor. You meant to say vii in Eb minor harmonic and melodic ascending only, didn't you?
B) (No. 6) G b minor chord: You said I did not give the correct response in place of my error which I identified. My correct response: IV in Db Major.
Now for some questions from the new lesson which is pretty clear:
1) Perhaps I don't know my intervals well. What is the difference between the minor 7th and the major 7th? Minor is 5 tones, Major 5.5? Also, in general, are the Major intervals found in the Major scales and the minor intervals in minor scales; or doesn't it have to do anything with the nature of the scale (whether it is Major or Minor)?
2) You refer to a few reasons that cause the Dominant 7th chord to sound unstable, and mentioned the tritone interval as one. What are the other reasons?
3) Are there other unstable chords in need of resolution? Which ones are they (unless I am jumping into the next lessons)?
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A) Yes, correct.
B) I believe the chord I gave you was Gb MAJOR and not MINOR. I think that is why you made the error. Therefore, you still have an error with this answer but can easily be corrected one you make the mental adjustment from Gb minor to Gb Major.
1) Yes, you are correct regarding the number of step for the minor and Major 7th. A minor 7th is 5 Whole steps while the Major 7th is 5 Whole steps and one half step.
When the term "minor" or "Major" is used to identify an interval is has to do with the number of whole and half steps that creat the interval and not whether or not the scale is Major or minor. Although in we are talking about a specific chord (the Dominant 7th), it can exisit in any key, Major or minor. You just have to remember that this particular chord will be built on the Dominant scale degree (V), it will be a Major chord, and that the additional note (the 7th) will be an interval of a minor 7th from the root (scale degree V). Therefore, in the key of C, the Dominant 7th chord is G-B-D-F. G is the root as it is scale degree V. Therefore the chord built on this degree will be a Major chord. The added note "F" is an interval of a minor 7th from the root note "G".
2) The tritone is one reason. Another reason is the interval of the minor 7th that also calls for resolution.
3) We will eventually get to the other "unstable" chords.