English: The opening of Tristan und Isolde by Richard Wagner (a public-domain work) in piano score.

I have revised the source code used to create File:Wagner Tristan opening.png to (a) make it more concise and (b) bring it up-to-date with the latest version of GNU LilyPond syntax, and recompiled it as an SVG file using a recent version of the program (2.19.28, as opposed to the original which used the ancient 2.2.0). The only other substantial difference in the source code is that I have removed the audio output commands from the original.

The engraving itself is identical to the original, apart from the improvements that the program has made to things like slur shapes over the years since version 2.2.0 came out. As in the original, "Dynamic indications have been left off both to make coding easier and to reduce clutter."

Both the original PNG file and the music are in the public domain, the former because it was explicitly released as such by its creator, and the latter because it was published before 1923 and the composer has been dead for at least 70 years.

The new source code is as follows:

\version "2.19.28"

A = \relative c'' {
  \time 6/8 \partial 8
  \voiceOne
  s8 | s2. |
  gis4.~( gis4 a8 |
  ais8 b4~ b8) \oneVoice r r |
}

B = \relative c' {
  \voiceTwo
  a8( |
  f'4.~ f4 e8 |
  dis2.)( |
  d!4.)~ d8 s s |
}

C = \relative c {
  \clef "bass"
  r8 |
  R1*6/8 |
  <f b>2.( |
  <e gis>4.)~ <e gis>8 r r |
}

\score {
  \new PianoStaff <<
    \new Staff <<
      \new Voice \A
      \new Voice \B
    >>
    \new Staff \C
  >>

  \layout {
    indent = 0.0\mm
    ragged-right = ##t
  }
}