It's simply a different tradeoff due to stylistic differences. Jazz has more color chords, and less inversions and chords with supensions and anticipations moving up and down chromatically, so it has a notation that makes writing chord colors easier, at the cost of making inversions and inner voice movement harder to write.fmr wrote:Well, I had my dose of figured bass, and we sometimes had pretty nasty chords to deal with, yet the fidures were plain simple. We have a given tonality. If we want a 7 chord, we have the bass and we write simpy 7. What notes it has - the notes that belong to tonality, of course. If we want other notes, we write # or b or b-square, depending on what alterations are needed, for the notes that are to be altered. If the 7 is inverted, we have 6 5, or 4 3 or 2. When I see a 2 I already know it's a seventh chord in the third inversion. That's it. It works for whatever notes are there. I just need a bass and a figure.jancivil wrote: So I had some experience with lead sheets and, by the time I actually went to conservatory (21 yrs old) I was quite versed in jazz concepts. It seems queer that you'd think I was shocked, since I gave a not-too-shabby primer on Russell's Concept. I don't call myself a jazz musician, but I have lived next door to that world for a good portion of my musical life. Including writing some pretty hip big-band charts for shows. I'm pretty hip actually.
For a 9, we write 9, and for the inversions, the relevant intervals, the same way we used to do for the 7. No big deal. Why write Esus b9 if what we want is the plain F that belongs to the tonality? If it's there, is a 9, plain and simple. And what the f*ck is a "sus"? Nothing is suspended there (that's a reminiscence of the counterpoint laws, I guess), it's a 4, plain and simple. If the 9 is major or minor depends entirely on the root note and which tonality we are in. Sometimes, it seems like jazz people don't even know which tonality they are playing on, and have to be told which notes each chord has, one by one, even when those notes have no alterations at all. And all those different symbols to the same chord, it's a total mess. Why not just write 7, as Jan said? Why is it so complicated?
Ok, how about an example of a Bossa Nova song written in (an approximation of) both notations to show the differences and trade-offs?
The Girl from Ipanema (F major)
https://www.youtube.com/watch?v=c5QfXjsoNe4
Jazz notation (from "The Real Book"):
Fmaj7 G7 G-7 Gb7b5 Fmaj7 Gb7b5
Fmaj7 G7 G-7 Gb7b5 Fmaj7
Gbmaj7 B7 F#-7 D7 G-7 Eb7
A-7 D7b9(#11) G-7 C7b9(#11)
Fmaj7 G7 G-7 Gb7b5 Fmaj7
ROUGH approximation in figured bass (I'm doing the best I can here, normally you'd have the bass notes on a staff, I'm using · here to separate chord names that would be ambiguous, there's probably a better way of writing "Gb·b7bb5")
F7 G7 G7 Gb·b7bb5 F7 Gb·b7bb5
F7 G7 G7 Gbb·b7bb5 F7
Gb7b5 B7#5# F#7#5 D7# G7 Eb7
A7 D·b9(#11)# G7 C·b9(#11)
F7 G7 G7 Gb·b7bb5 F7