Reharmonization Techniques using Mapping Tonal Harmony Pro - 4. Cadential 64 and 7sus4
Ariel J. Ramos (mDecks Music)
App Developer, Composer for film and video games at mDecks Music
A Cadential 64 chord is the I over the root of the V. In C major it would be: C/G and in C minor Cm/G
The I64 gets its name from the intervals that appear in a second inversion (which is what a C/G is) G is on the bass and C and E are above it. G-E is a 6th and G-C is a 4th. The chord is then notated as I64.
The I64 or i64 are usually use before the V7 and they want to resolve to it.
The other function that behaves like those two is the V7sus4 which is simply a V7 where the 3rd has been suspended with the 4th. The V7sus4 also wants to go to the V7 (although in Pop music it is usually used as a replacement for the V7 and resolves directly to I)
In Mapping Tonal Harmony Pro the cadential 64 and 7sus4 are all located together next to the V7
Here's the lesson
Next: Secondary Dominants