stringTuning question

[Menu Jacques]

Hello folks,

In the second score below, I replaced calls to ly:make-pitch, as generated by 
musicxml2ly, by the more modern chord-like notation <d' b g d a, d,>.
Thought the two of them would be equivalent, but I get the following messages:

Starting lilypond 2.19.44 [staffTuning problem.ly]...
Processing `/Users/menu/Desktop/staffTuning problem.ly'
Parsing...
Interpreting music...
Preprocessing graphical objects...
Interpreting music...
warning: Requested string for pitch requires negative fret: string 5 pitch 
#<Pitch cis >
warning: Ignoring string request and recalculating.
warning: Requested string for pitch requires negative fret: string 5 pitch 
#<Pitch dis >
warning: Ignoring string request and recalculating.
warning: Requested string for pitch requires negative fret: string 5 pitch 
#<Pitch dis >
warning: Ignoring string request and recalculating.
warning: Requested string for pitch requires negative fret: string 5 pitch 
#<Pitch dis >
warning: Ignoring string request and recalculating.
warning: Requested string for pitch requires negative fret: string 5 pitch 
#<Pitch cis >
warning: Ignoring string request and recalculating.
Preprocessing graphical objects...
Finding the ideal number of pages...
Fitting music on 1 page...
Drawing systems...
Layout output to 
`/var/folders/jc/xrpy67_x6_vcjfzpzds_9_6m0000gn/T//lilypond-0prDiH'...
Converting to `staffTuning problem.pdf'...
Deleting `/var/folders/jc/xrpy67_x6_vcjfzpzds_9_6m0000gn/T//lilypond-0prDiH'...
Success: compilation successfully completed
Completed successfully in 0.7".

Any hint as to this happens is welcome!

JM

—


\version "2.19.35"
% automatically converted by musicxml2ly from GuitarTablature.xml_inter.xml

PartPTwoVoiceOne =  \relative cis {
  \clef "tab"

  \stopStaff
  \override Staff.StaffSymbol #'line-count = #6
  \startStaff

  \key fis \major | % 1
  cis16 ^"Tuning D-A-D-G-B-D, Capo 4th fret" \5 dis8 \5 b'8 \3 ais16
  \4 dis,8. \5 b'8 \3 ais16 \4 dis,16 \5 cis8. \5 | % 2
}

% The score definition
\score {
  <<
    \new TabStaff \with {
      stringTunings = #`( ,(ly:make-pitch 0 1 0)
                          ,(ly:make-pitch -1 6 0) ,(ly:make-pitch -1 4 0)
                          ,(ly:make-pitch -1 1 0) ,(ly:make-pitch -2 5 0)
                          ,(ly:make-pitch -2 1 0) )
    } <<
      \set TabStaff.instrumentName = "Guitar"
      \context TabStaff <<
        \context TabVoice = "PartPTwoVoiceOne" { \PartPTwoVoiceOne }
      >>
    >>

  >>
  \layout {}
  % To create MIDI output, uncomment the following line:
  %  \midi {}
}

% The score definition
\score {
  <<
    \new TabStaff \with {
   % ********* HERE *********
   stringTunings = \stringTuning <d' b g d a, d,>
    } <<
      \set TabStaff.instrumentName = "Guitar"
      \context TabStaff <<
        \context TabVoice = "PartPTwoVoiceOne" { \PartPTwoVoiceOne }
      >>
    >>

  >>
  \layout {}
  % To create MIDI output, uncomment the following line:
  %  \midi {}
}