midi instrument for ChordNames

[Sandro Santilli]

I can't get anything but a piano rendering of ChordNames staff,
can other instruments be used ? If so, how ?

This is my sheet snippet:

  <<
    \new ChordNames {
      \set midiInstrument = "flute" % does not work here
      \harmony
    }
    \new Staff
    {
      \set Staff.midiInstrument = "flute" % works fine here
      \new Voice = "vocal" { \melody }
    }
  >>

Thanks in advance

--strk;