strange midi problem

[Federico Bruni]

Hi,

I have a strange issue (see attached minimal example).

I'm using a guitar tuning where 6th and 5th string are tuned 1 fret down
(DGDGBE).

The harmonic over 7th fret of 4th string (an a) is displayed correctly
(on 7th fret) only if I use a(n incorrect) lower pitch. Otherwise it's 1
pitch up... and I get a <19> on TabStaff.

The curious thing is that, if I use the lower pitch, it displays the
note as being on 4th string, while it would be actually on 6th string.

I hope the example will make it more clear (look at second voice).

Am I missing something?

Thanks,
Federico

\version "2.13"


global = {
  \key g \major
  \time 4/4
  \set Staff.midiInstrument = #"acoustic guitar (steel)"
  %% tuning: DGDGBE
  \set TabStaff.stringTunings = #'(4 -1 -5 -10 -17 -22)
}

first =  \relative c'' {
  \global

  %% 1
  \repeat volta 2 {
  s16 <g\3\harmonic> <b\2\harmonic> <e\harmonic> ~
  \once \override HarmonicParenthesesItem #'stencil = ##f 
  <e\harmonic> <g,\3\harmonic> <b\2\harmonic> <e\harmonic>
  
  <e\harmonic> <g,\3\harmonic> <b\2\harmonic> <e\harmonic> ~
  \once \override HarmonicParenthesesItem #'stencil = ##f 
  <e\harmonic> <g,\3\harmonic> <b\2\harmonic> <e\harmonic> |
  }
  
  
}

second =  \relative c' {
  \global

  %% 1
  <a'\4\harmonic>4 % right pitch in midi but wrong fret in TabStaff
  <a\4\harmonic>
  <a,\4\harmonic> % right fret in TabStaff but wrong pitch in midi
  <g\5\harmonic> % here I should have put a g,
}



\score {
  \new StaffGroup <<
    \new Staff = "guitar" <<
      \context Voice = "first voice" { \clef "G_8" \voiceOne  \first }
      \context Voice = "second voice" { \clef "G_8" \voiceTwo  \second }
    >>
    \new TabStaff = "tab" <<
      \context TabVoice = "tab first voice" { \clef "moderntab" \voiceOne \first }
      \context TabVoice = "tab second voice" { \clef "moderntab" \voiceTwo \second }
    >>
  >>

  \layout {
    indent = #0
    \context {
      \Staff
      \override StringNumber #'transparent = ##t
    }
  }
  \midi {
    \context {
      \Score tempoWholesPerMinute = #(ly:make-moment 80 4)
    }
  }
}
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