Editing Extended technique (section)

===Percussion===
* rudimental or "dynamic" double bass on the drum set, using hand rudiments such as [[double-stroke roll|double stroke rolls]] and [[Flam (drum rudiment)|flam taps]] and playing them with the feet
* stacking 2 or more [[cymbal]]s, one on top of the other, to change the sound properties of the instrument
* bowed vibraphone, cymbals, and gongs
* resonance effects (e.g., cymbal played on a timpani; cow bell struck against a bass drum, etc.)
* pitch bends on mallet percussion
* harmonics
* custom-built [[percussion]] [[mallets]], occasionally made for [[vibraphone]] or [[tubular bell]]s (and other pitched-percussion in increasingly rare circumstances) which feature more than one mallet-head, and so are capable of producing multiple pitches and 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