chord-dictum question

[strumm]

In this simple example from the documentation.  The first chord is divided into 5, but why are the pitches for the 2nd through 5th chord division seemingly random?  The dictum states a rule for dividing the chord rhythmically, but has no rules for altering pitches?

 

(setf mat1 '((h a2b2e3f3gs3 mf)
             (h a2b2e3f3gs3 p)
             (q bb4c5gs5a5b5 mp q bb4c5gs5a5b5 p)))

 

(chord-dictum '((:len h :chd 5 :div 5) (:len q :chd 5 :div 4)) mat1)

 

 

[Stephane Boussuge]

The chords are randomly inverted to add variety but keep the harmonic content. If you want to alter the pitch, you can use interval transposition in dictum.

 

 

[strumm]

 

(h a2b2e3f3gs3 mf) --> (5h bb2c3f3fs3a3 mf g2a2d3eb3fs3 gs2bb2eb3e3g3 b2cs3fs3g3bb3 bb2c3f3fs3a3)

 

Isn't inversion just changing the bass note and note ordering of the existing notes? How does bb2 and fs3 get introduced?

[Stephane Boussuge]

Sorry, my mistake, I reply too quickly without thinking.... It is not chords inversion.

It is the use of function length-divide internally who produce this result because length-divide apply some intervals.

Look at the doc for length-divide function.

If you provide intervals to the function you can modify this behavior, for example , if you want only the chords notes, you can do:

 

(setf mat1 '((h a2b2e3f3gs3 mf)
             (h a2b2e3f3gs3 p)
             (q bb4c5gs5a5b5 mp q bb4c5gs5a5b5 p)))
 
(chord-dictum '((:len h :chd 5 :div 5 :int '(0)) (:len q :chd 5 :div 4)) mat1 )

=> ((5h a2b2e3f3gs3 mf a2b2e3f3gs3 a2b2e3f3gs3 a2b2e3f3gs3 a2b2e3f3gs3)

 

[strumm]

Thank you,

 

I hadn't noticed that about length-divide before.  So length-divide is actually divides pitches when applied to omn

 

With the :int parameter set at '(0), is there a way to still allow it to do chord inversions as well, rather than play the exact same chord voicing?  And vary the number of chord tones played?  

[Stephane Boussuge]

The number of chord tones played is controlled with the :group parameter.

 

About chord inversion or randomisation of position, it is probably possible to do a kind of post processing with rnd-order or something similar.