feature request (concerning midi-output)

[Werner]

I'd like a feature which allows the following 
(and I think, that should be the default): 

\score {
        \new StaffGroup
        <<
        
        \new ChordNames 
        \Harmonien
        
        \new Staff 
        {
        \clef F
        \relative c {
        \Zweite
        }
        }

        >>

\layout {
}

\midi {
        \context {
        \Score
        % harmonies = ##f
        % (output all voices but no harmonies from chordNames!)
        }
}

}

Werner