Bisbigliando ("whispering" in
Italian) is a special
tremolo effect on the
harp where a
chord or
note is rapidly repeated at a low volume. Usually, the effect is achieved by both hands playing adjecent strings set to the same
pitches. This is possible because of enharmonic spellings created by the pedals.
It can sound like strumming a
guitar or even "watery".
On sheet music, it is represented by three thick lines connecting the notes to be trilled.