difficult chords (though usually only the chords they were designed to play). These mallets are seldom used, and percussionists sometimes make them themselves when they are needed. When implemented, they are usually only used once or twice in an entire work, and are alternated with conventional mallets; usually they are used only when playing a different instrument in each hand.
* striking a gong and then inserting the vibrating metal into a tub of water, creating a glissando
* placing a cymbal on a timpani head

Electronic