Suppression des avertissements de chevauchement
If notes from two voices with stems in the same direction are placed at
the same position, and both voices have no shift or the same shift
specified, the error message « warning: ignoring too many clashing note
columns » appears when compiling the LilyPond file. This message can be
suppressed by setting the ignore-collision property of the
NoteColumn object to #t. Please note that this does not
just suppress warnings but stops LilyPond trying to resolve collisions
at all and so may have unintended results unless used with care.
ignore = \override NoteColumn.ignore-collision = ##t
\relative c' {
\new Staff <<
\new Voice { \ignore \stemDown f2 g }
\new Voice { c2 \stemDown c, }
>>
}