setting TabStaff.minimumFret causes MIDI channel wrap

[Steve Yegge]

I've been getting hundreds of these warnings in each of my music files:

warning: MIDI channel wrapped around

warning: remapping modulo 16

These warnings begin to accumulate as I add calls to set the minimumFret.

It seems to be related to the transposition calls I'm doing as well, since

removing them makes the warning go away.

I've included a minimal example that demonstrates the problem

with just one warning.   In the real music I never set the minimum fret

to the same value twice in a row, but doing it here simplified the example.

I make an effort to try to keep my music files warning free, so it pains me

to see hundreds of these scroll by on every compile.  If I'm structuring my

files wrong (e.g. the way I'm instantiating the staffs or doing the transpositions)

I'm happy to change them.  But this was the only way I could manage to

force the tabs and the MIDI output both into the correct octaves.

Thanks,

-steve

\version "2.13.10"

music = {

  <<

    \relative c' {

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

      \set TabStaff.minimumFret = #1 c

    }

  >>

}

\score {

  {

    <<

      \new Staff { \music }

      \new TabStaff { \transpose c c, { \music } }

    >>

  }

}

\score {

  {

    \transposition c \music

  }

  \midi {

    \context {

      \Score

    }

  }

}