Well, time to thank you all for your efforts to get me understand what I
am doing. As (almost) usual there already exists a solution in LilyPond,
but it is hidden by so much else, so you do not find it. In my country
we sometimes say that "you do not see the forest because of all the
trees" (in a home made ugly translation!).
I had already discovered the "chordnameexceptions", but as I do not know
the Scheme language (yet), I had not seen exactly how to use it. And the
explanation in the Notation Reference is really not very exhaustive. So
the construct with "powerChordExceptions" was new to me, as well as that
with "\powerChords". Even if I had already come in contact with power
chords and roughly understand what they mean, it was first after
following your advice, I found them in the "Guitar" section. I had
really not looked there, as my target was a piece of piano music.
But thank you everybody for your contribution to my new knowledge.
/Kaj
On 2015-09-17 13:29, pls wrote:
Thomas Morley <thomasmorle...@gmail.com> writes:
2015-09-17 10:47 GMT+02:00 Simon Albrecht <simon.albre...@mail.de>:
Hello Kaj,
On 17.09.2015 09:27, 70147pers...@telia.com wrote:
First I will declare, that I am not 100 percent sure this is a bug, but
friends of mine, musicians, say it probably is. Also, as I am not an expert,
I have tried to learn by searching on among others Wikipedia.
It is about chords, a few of them. It started when I should clean write a
score from a manuscript. In one measure there were noted two chords, C5 and
C. Obviously not the same, as they stood just beside of each other. A search
on Wikipedia also told me, and this was also confirmed, the author's
intention, that C5 means C(no 3), hence <c g>, while the chord C means <c e
g>. But LilyPond treats these two the same and produces the same notes. This
is also clearly said e.g. in Appendices A.1 and A.2 of Notation Reference,
as well as in the text part. However even if possibly a correct procedure,
is it a correct practise?
Another such discrepancy is about Csus, which Wikipedia (and my friends)
says is equivalent to Csus4, hence <c f g>. But LilyPond produces <c g>,
hence what should come from the notation C5 as in the previous paragraph.
So, what is the truth?
There are others who are more into the subject, but I may say:
There is no ‘truth’. With chord names, there are so many different
conventions and fiercely defended convictions that it’s impossible to define
a single ‘standard’ naming scheme. (Edit: just like the NR says)
Very true.
It's a mess, but LilyPond can handle it. ;)
Many things in the chords rendering may be overridden in LilyPond. In case
you’re not aware yet, check out
<http://lilypond.org/doc/v2.18/Documentation/notation/displaying-chords#customizing-chord-names>
and perhaps the LSR <http://lsr.di.unimi.it>. If that doesn’t cover your
wishes, you may come back with a code example, I’d suggest.
HTH, Simon
chrds > \chordmode {
\set chordNameExceptions > #(append
powerChordExceptions
ignatzekExceptions)
c:1.4.5
c:1.5
\notemode {
<c' f' g'>
<c' g'>
}
}
<<
\new Staff \chrds
\new ChordNames \chrds
If it's not sufficient you can set your own 'exceptions' for
chord-naming, see the links Simon provided.
HTH,
Harm
It's not necessary to define power chord exceptions. They are already
defined. All you have to do is:
chrds =
\powerChords
% e.g.
\chordmode { c,:1.5 }
% or e.g.
<c, g>
}
<<
\new Staff \chrds
\new ChordNames \chrds
BTW: The power chord examples here:
http://lilypond.org/doc/v2.19/Documentation/notation/common-chord-modifiers
are not complete. The chord names are missing.
hth
patrick
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