Re: Syntax explanations

[Reinhold Kainhofer]

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Am Mittwoch, 11. Juni 2008 schrieb Carl D. Sorensen:
> > Maybe you can take a look at the musicxml2ly code 
[...]
> > and tell me if I used the correct modifiers/numbers for all
> > the chords defined in MusicXML
> > (http://www.musicxml.org/dtds/direction.html, search for "Triads"
> > to get to the list of defined chord names).
>
> I've looked at your code.  Some comments:
>
> 1. You put 5 on all of the triads.  Is this so that you can do step
> removal, addition, or alteration automatically?  It's not wrong, but it's
> not the way chords are "normally" written in LilyPond.  Actually, it's more
> logically consistent.

Exactly, additions/removals/changes are done by simply appending the 
corresponding strings like ".3-". Since I ran into trouble with a major chord 
without the 5 (i.e. c:.3- doesn't work), I simply added the 5 to all triads 
to be on the safe side.

> 2.  I believe your major-minor is wrong.  I think it should be maj7m,
> maj7m5 or maj7.3-.  I think as written you have a minor seventh, not a
> major seventh.

Thanks, fixed.

> 3. "power" could be implemented as "5^3", I believe.

Okay, done.

> 4. LilyPond supports the first inversion in the form of added bass notes. 
> So the first inversion of C major would be c:/g.   To get the second
> inversion of C major, you would need to do e:6-3-^5 or e:m6-^5.  However,
> both of these techniques require you to know the chord and calculate either
> the fifth pitch (for the first inversion) or the third pitch (for the
> second inversion) so they may not be helpful for musicxml2ly.

Thanks for the hint. I already have the base pitch of the chord (the <root> 
element in MusicXML), so this would be possible in theory, but apparently 
quite some work.

Cheers,
Reinhold
- -- 
- ------------------------------------------------------------------
Reinhold Kainhofer, Vienna University of Technology, Austria
email: address@hidden, http://reinhold.kainhofer.com/
 * Financial and Actuarial Mathematics, TU Wien, http://www.fam.tuwien.ac.at/
 * K Desktop Environment, http://www.kde.org, KOrganizer maintainer
 * Chorvereinigung "Jung-Wien", http://www.jung-wien.at/
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