[PD] pd-based procedural chord progression database..

[Patco]

Chuckk Hubbard a écrit :
>
> >Are you familiar with the "Gestalt" perception laws?
I've checked it, that's interesting, but I wouldn't say that I am 
familiar with it.
>  Is the simplest way to describe a harmony with letters the
> same as the simplest way to hear it?
For playing a standard jazz, we use a book called: The real Book.
There are many volumes of 300-400 pages full of most popular jazz standards.
Any jazzman would say that learning jazz is actually done through this book.

In each score there are several levels of information:

1 The chords which are wrote with letters like CM7, G7b9b5, FM7#11/G, 
ect ...
2  The musical score with melody, and nuances ( but nuances usually have 
to be deduced from the emotion of the players)
3 The structure of the tune, where parts are also called with letters, 
part A, part B, ...
and almost every structures are like that:

A A B A

4 words of the song
...

Voicing is the best way for both following the harmony
and giving the soloist and the singer the notes of the melody

Personaly, I don't think at all that full piano scores is for jazzmen,
but for classical pianists that are too lazy to learn jazz.

Don't forget that jazz is a music for improvisators.

> >  And of course it depends on
> >voicing, range, and changes.
When I began to practice jazz with my guitar, and learned about voicing,
I wanted to make a classification of every sounding voicings of every 
chords,
like Joe Pass did in one of his book, but,

the amount of combinations is very high, just an exemple:

in the major scale we have four types of chords with four sounds using 
the 7th

M7, 7, m7, and m7b5

so we have 2^4 combinations of four different chords which has 4 
different voicings,
then we could make at least  16*4*4= 256 different chords,

and five types of chords with five sounds

M79, 79, m79, m7b9, m7b9b5

then 2^5*5*5= 78125 different chords

etc...

Obviously not all the chords are sounding good, mostly the ones where 
the basses
has an interval lower than the fifth
(and we uses to remove the fifth because this note is sounding like the 
fundamental)

and some chords are almost similar with other chords
eg: CM7 = C E G B = Em6 = E G B C

I think that it might be possible to make a mathematical formula
instead of a database of chords,
but I am not good enough with math' to write a formula that would give 
all sounding chords
in an harmonical context.

Patco.

	
 p4.vert.ukl.yahoo.com uncompressed Mon Aug 14 20:27:01 GMT 2006 
	
		
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