The tremolo should move over the strings in a kind of upwards and downwards arpeggio movement. This section is a good preparation for Berio's Sequenza VI. (Knox)
The stroke starts by throwing the bow as in ricochet then immediately picking up and continuing the bounce with an oscillating tremolo over two strings. (Knox)
Bow stroke » Tremolo » Unmeasured -- see measure 15:
Crossing the line between measured and unmeasured is one of the main concerns of this study. Accents on unmeasured tremolo are an aid to the gesture of throwing the hand and leaving it relaxed. (Knox)
