Modulation using Diminished 7ths - Music Theory
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Date: 2022-03-28
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Comments and reviews: 10
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I didn't understand by which mechanism does enharmonic re-spelling of a Diminished 7th chord allow these modulations.
For instance, in the second example, when you re-spelled BDFAb as CbDFAb, you said that it can now be considered as the V7 chord of Eb Major or Eb minor.
Since the V7 of Eb Major or minor is a B chord, I don't understand how re-spelling B into Cb makes that a B chord, when now there is no B in that chord anymore?
Is that chord now considered a D chord (DFAbCb), or maybe as some other chord?
Similarly, in the first example, when we re-spell BDFAb into BDFG#, is that now considered a G# chord, and is that what allows the modulation into A Major, A minor, D Major, and D minor?
Does it allow modulation into A Major and A minor because a G# chord could be vii chord in them and vii could lead into I, or is some other mechanism used here?
I also don't understand how this re-spelling allows us to modulate to D Major and D minor. Is it because a G chord can be considered IV in those keys and that somehow leads to I?
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I didn't understand by which mechanism does enharmonic re-spelling of a Diminished 7th chord allow these modulations.
For instance, in the second example, when you re-spelled BDFAb as CbDFAb, you said that it can now be considered as the V7 chord of Eb Major or Eb minor.
Since the V7 of Eb Major or minor is a B chord, I don't understand how re-spelling B into Cb makes that a B chord, when now there is no B in that chord anymore?
Is that chord now considered a D chord (DFAbCb), or maybe as some other chord?
Similarly, in the first example, when we re-spell BDFAb into BDFG#, is that now considered a G# chord, and is that what allows the modulation into A Major, A minor, D Major, and D minor?
Does it allow modulation into A Major and A minor because a G# chord could be vii chord in them and vii could lead into I, or is some other mechanism used here?
I also don't understand how this re-spelling allows us to modulate to D Major and D minor. Is it because a G chord can be considered IV in those keys and that somehow leads to I?
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wayne
The diminished 7th chord the diminished 7th degree is an out of key note because in the key of C major the diminished 7th chord is B diminished which is B-D-F-Ab. The Ab diminished 7th note is an out of key note in the key of C major, so I'm very confused why this is acceptable and considered ok to use? Why is the diminished 7th chord considered good and ok to use an out of key note in the major and minor key centers?
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The diminished 7th chord the diminished 7th degree is an out of key note because in the key of C major the diminished 7th chord is B diminished which is B-D-F-Ab. The Ab diminished 7th note is an out of key note in the key of C major, so I'm very confused why this is acceptable and considered ok to use? Why is the diminished 7th chord considered good and ok to use an out of key note in the major and minor key centers?
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Stefano
Oh yes, that's great. The funny part is going back to the starting key without dim 7th... from E flat minor back to C major... Ludwig vB was a master of key jumping (take Patetica 2nd movement for example). Hoping to find a video on that very soon. Thanks a lot as usual for sharing your great musical knowledge! Cheers from Italy!
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Oh yes, that's great. The funny part is going back to the starting key without dim 7th... from E flat minor back to C major... Ludwig vB was a master of key jumping (take Patetica 2nd movement for example). Hoping to find a video on that very soon. Thanks a lot as usual for sharing your great musical knowledge! Cheers from Italy!
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Unexpected
The crazy thing about your videos is that your tricks are explained so simple yet so precise which makes it actually possible to implement them in one's compositions! Though, simultaneously you're able to not only follow the blueprints but also grasp the underlying music theory. Thanks a lot!!
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The crazy thing about your videos is that your tricks are explained so simple yet so precise which makes it actually possible to implement them in one's compositions! Though, simultaneously you're able to not only follow the blueprints but also grasp the underlying music theory. Thanks a lot!!
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Music
Thank you for shedding some light of the Diminished 7th chord in terms of opening up possibilities of adding colour to a composition. It also helps me understand the umpteen chord changes on Chopin's Fantasie Impromptu! Big THANK YOU again!!
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Thank you for shedding some light of the Diminished 7th chord in terms of opening up possibilities of adding colour to a composition. It also helps me understand the umpteen chord changes on Chopin's Fantasie Impromptu! Big THANK YOU again!!
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Khiem
Hi Gareth, I don't know how you can modulate from C major to Eb major. The seventh chord in discussion is [Cb D F Ab] but there is no Cb in the key of Eb major. Which chord of Eb major corresponds to this chord ([Cb D F Ab]) ? Thanks!
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Hi Gareth, I don't know how you can modulate from C major to Eb major. The seventh chord in discussion is [Cb D F Ab] but there is no Cb in the key of Eb major. Which chord of Eb major corresponds to this chord ([Cb D F Ab]) ? Thanks!
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jamie
Lowering each note one at a time gives you four different dominant 7th chords, and raising each note gives a minor triad with an added 6th interval. Raising or lowering multiple notes at once gives even more options. It-s amazing.
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Lowering each note one at a time gives you four different dominant 7th chords, and raising each note gives a minor triad with an added 6th interval. Raising or lowering multiple notes at once gives even more options. It-s amazing.
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muzaret
Once again ... wow. Comprehensive content, enjoyable bits of humour and immediate piano example. What a holy trinity for us music theory students! Our pleasure is not diminished. Many thanks again. Greetings from Paris.
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Once again ... wow. Comprehensive content, enjoyable bits of humour and immediate piano example. What a holy trinity for us music theory students! Our pleasure is not diminished. Many thanks again. Greetings from Paris.
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denis
hi music matters i am addicted to diminished chords and your vids on the subject are amazing many thanks i am still on grade three but i need to know every thing possible using diminished. WOW just WOW
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hi music matters i am addicted to diminished chords and your vids on the subject are amazing many thanks i am still on grade three but i need to know every thing possible using diminished. WOW just WOW
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Sally
Diminished 7th chords are pure magic. Each note of these chords is the leading tone to a new key!! And there are only three of them (in different inversions, sure).
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Diminished 7th chords are pure magic. Each note of these chords is the leading tone to a new key!! And there are only three of them (in different inversions, sure).
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