snippet to automatically elaborate a bass line

[Gianmaria Lari]

Is there any snippet that automatically convert the chord accompaniment at the bass in something a bit more elaborate for the midi?

For example, I write this

\version "2.19.82"

lh = \chordmode { c4 a:m d:m g }

rh = \fixed c' { e8-. e-. g-. e-. f16 g f e~ e8 d-. }

\score 

{ 

  <<

    \new Staff \rh    

    \new ChordNames \lh

  >>

  \layout {}

  \midi{}

}

and I would like to get (for example) something like this:

\version "2.19.82"

lh = \chordmode { c4 a:m d:m g }

lhMidi = {\clef bass  c,8 <c e g> a,, <a, c e> d, <d f a> g,, <g, b, d> }

rh = \fixed c' { e8-. e-. g-. e-. f16 g f e~ e8 d-. }

\score 

{ 

  <<

    \new Staff \rh    

    \new ChordNames \lh

  >>

  \layout {}

}

\score {

  \new PianoStaff 

  <<

    \new Staff \rh

    \new Staff \lhMidi

  >>

  \midi { }

}

Thank you, g.

P.S. My apologies if the musical words are not correct. I hope I have been clear anyway.