\include "predefined-guitar-fretboards.ly" << \new ChordNames { \chordmode { c1 | f | g | c } } \new FretBoards { \chordmode { c1 | f | g | c } } \new Voice \with { \consists "Pitch_squash_engraver" } { \relative c'' { \improvisationOn c4 c8 c c4 c8 c f4 f8 f f4 f8 f g4 g8 g g4 g8 g c4 c8 c c4 c8 c } } \new Voice = "melody" { \relative c'' { c2 e4 e4 f2. r4 g2. a4 e4 c2. } } \new Lyrics { \lyricsto "melody" { This is my song. I like to sing. } } >>