@strong{@emph{RhythmicStaff}}
-Like @code{Staff} but for printing rhythms. Pitches are ignored;
-the notes are printed on one line.
+Like @code{Staff} but for printing rhythms. Pitches are ignored
+when engraving; the notes are printed on one line. The MIDI
+rendition retains pitches unchanged.
@strong{@emph{TabStaff}}