Timpani
With a pedal timpani, a player can produce different sound effects using the pedals. Performing glissando on timpani demands switching the pedals. Glissando is generated by pressing the pedal during the vertebra. Furthermore it is possible to play glissando at any volume level up or down. For example, Alexander Rahbari, an outstanding Iranian-Austrian composer used glissando effect produced by switching timpani pedals in the opening of his piece, Persian Mysticism Around G, where the player moves from Bb up to C and then rolling down to G(see the timpani part on right below).