Techniques such as arpeggio, pedal-point, staccato, tremolo and glissando are used to depict moving water. The instrument also had controls for glissando, portamento, and "timbre attack" (a type of chorusing). String-bending for example may be used to produce a glissando or portamento. In this way, the glissando differs from portamento. Pianists can also complete a glissando of two pitches an octave apart. In some versions the chirps can be approximated by a chromatic glissando. Hillage also played a Moog synthesizer and glissando guitar on the album. Beguiling, affecting songs are then shot through with noise cloudbursts, psychedelic harmonies and glissando melodies. Dylan ends the performance with a brief upward glissando on the piano. The end of each phrase is marked by a descending glissando. Together with the violas, they repeat a glissando throughout the section. The guitar glissando continues to be played during the verses. The breakdown has the feel of Spanish music, with the glissando evoking the string arrangements. Bosko hits more random notes, then plays a glissando. This effect also results in a Shepard-Risset glissando.