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## Re: "bitonal" key signatures

 From: Phil Holmes Subject: Re: "bitonal" key signatures Date: Wed, 10 Feb 2016 13:40:22 -0000

Better would be to add \tweak X-extent #'(0 . 0) just before the C major key sig in the right hand?
```

--
Phil Holmes

```
----- Original Message ----- From: Pierre Perol-Schneider
```To: N. Andrew Walsh
Cc: lilypond-user
Sent: Wednesday, February 10, 2016 1:19 PM
Subject: Re: "bitonal" key signatures

... but is probably not the "better" way!

```
2016-02-10 14:18 GMT+01:00 Pierre Perol-Schneider <address@hidden>:
```
Hi Andrew,

In lhMusic mes.2 try :
...
\tweak X-extent #'(0 . 0)
\tweak extra-offset #'(-3 . 0)
\key es \major
....

Cheers,

Pierre

2016-02-10 13:36 GMT+01:00 N. Andrew Walsh <address@hidden>:

Hi List (again),

```
here's another question, more general: I have a piano part in which the upper voice is to have one key signature, the lower to retain another one (namely, the right hand has \key c \major, while the left hand has \key es \major, which was also declared at the start of the piece). Something like this:
```

\version "2.19.36"

beambreakOn = {
\set subdivideBeams = ##t
\set baseMoment = #(ly:make-moment 1/8)
\set beatStructure = #'(2 2 2 2)
}

beambreakOff = {
\set subdivideBeams = ##f
\set baseMoment = #(ly:make-moment 1/8)
\set beatStructure = #'(2 2 2 2)
}

rhMusic = \relative c'' {
\key es \major
\time 4/8
r16 bes d bes d bes d bes |
\key c \major
\beambreakOn \tuplet 3/2 { es,\( f g } \tuplet 3/2 { a b cis } dis4\) |
}

lhMusic = \relative c {
\clef bass
\key es \major
\time 4/8
<<
{ r16 d f d f d f d | }
\\
{ bes2 | }
>>
\key es \major
<<
{ es,16 bes' es bes g' d g d | }
\\
{ es,2 | }
>>
}

\score {

\new PianoStaff <<
\new Staff = "RH"  <<
\rhMusic
>>
\new Staff = "LH" <<
\lhMusic
>>
>>
}
------------

```
My issue is as follows: the engraver in charge of key signatures is displacing that second "\key es \major" expression in the left hand, presumably because there was already one in place from the beginning (or perhaps because it's assuming a possible collision with the "\key c \major" expression in the right hand). In either case, what I would prefer is that both new key signatures are not displaced horizontally, so that the second "\key es \major" is, in effect, merely a cautionary repetition of the one from the start and aligned underneath the naturals of the "\key c \major" expression in the right hand.
```

Is there a better way to do this?

Cheers,

A

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