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Determining SUS chords

Posted by jonel 
Determining SUS chords
April 09, 2018 02:59AM
Hi All,
I thought I understood the reasoning behind the suspended chord but now I'm not sure. I understand that harmonising a note that did not belong to the chord would be a particular problem if the harmonised note was a fourth of the supporting chord. For example (key of C), if the chord was C (C E G) and the note was F then the E an F would be a real problem of dissonance. The tension can be eased by raising the E of the C chord from it's third to F as the fourth (and so suspending the the third of the C chord). But when I came across the suspension for note B with a supporting F chord (F A C). On this basis I would have expected the A to be raised B to make Fsus4 but in fact I see it as specified as Fsus#4. So now I try to delve a bit further on this only to discover that the sus 4 is defined as being one half step above the third of the chord and sus 2 being one full step below the the third of the chord. This works for C major but not for some of the other chords.

Can anybody resolve (pun intended) this for me please?


Thanks

Jonel
Re: Determining SUS chords
April 11, 2018 10:48PM
One of the rationales for suspended chords is, as far as i ve got to know, that they enables some compound harmonic framework above a given set of notes played out upon a given number of parts: for instance, in the example C G C E becoming C G C F you would have a sort of twofold harmonic framework through the upper part working and shifting upon the C G C parts.

The triadic chord needs from time to time to be linked to some non-triadic chords for either harmonic or melodic reasons: seventh chords, suspended chords, etc.

You might also vary the number of parts or change the disposition of chords for the same purpose, etc.

Greetings
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