Re: Added ninth chord (symbol)

[Malte Meyn]

Am 29.04.2016 um 19:22 schrieb Henry Law:
> "add9" is not a valid chord designator in Lilypond, as far as I can see.
>   I can ask for "9" or "maj9" or "sus2" but none of these is my chord:

LilyPond knows the difference between 9 and add9 but doesn’t display it 
by default.

> Am I stuck?  I'm hoping there is some magic somewhere to help.

The magic is called additionalPitchPrefix. It can be found f. e. at 
section 2.7.2 of the Notation Reference. The following code prints “C9 
C9 Cadd9 C9”.

%%%%%
\version "2.18.2"

\new ChordNames {
  <c e g d'>
  <c e g bes d'>
  \set additionalPitchPrefix = "add"
  <c e g d'>
  <c e g bes d'>
}
%%%%%