stemBoth problem

[胡海鹏 - Hu Haipeng]

Hello,
  Vallentin ever helped me to get a stemBoth function when I wrote the full score of my song for attending the CCTV piano competition:

stemBoth = #(define-music-function (parser location m) (ly:music?)
#{ << \voiceOne $m \new Voice { \voiceTwo $m } >> \oneVoice #})

  Now I'm orchestrating Debussy's Clair De Lune. The British teacher is very happy with my progress, and the piece is coming to its finish. But when I use the function as follows (viola), I discovered its big disadvantage, and then had to use a usual input way:

\relative c {
  \clef alto \key des \major \time 9/8
    r8 <f aes>4\pp^"Div." \stemBoth ces'2. |
  }

  Both note and octave dot are copied, therefore the output is:

\relative c {
  \clef alto \key des \major \time 9/8
    r8 <f aes>4\pp^"Div." <ces' ces'>2. |
  }

  What a boring result! Could anyone tell me how to filter out the octave dot and leave only note?

Regards
Haipeng

 

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