When the first note on a staff is a grace note followed by a
tuplet the grace note must be placed before the @code{\times}
command to avoid errors. Anywhere else, grace notes may be
-placed within tuplet brackets.
+placed within tuplet brackets. When using a tuplet at the beginning
+of a piece with a @code{\tempo} mark, you must add an explicit
+@code{\new Voice} as discussed in @rlearning{Voices contain music}.
@node Scaling durations