LGTM now, thanks!
https://codereview.appspot.com/565750043/diff/557620047/scm/define-music-types.scm File scm/define-music-types.scm (right): https://codereview.appspot.com/565750043/diff/557620047/scm/define-music-types.scm#newcode685 scm/define-music-types.scm:685: . ((description . "A transition between lyric syllables.") Maybe s/transition/vowel transition/ ? https://codereview.appspot.com/565750043/
