The object of the muted sweep or rake is to give some momentum
to the note at the end of the sweep. The trick is to land on this target
note accurately. The sweep is a hard downstroke across three or more
strings that are muted by your right hand; we hear the rhythm of these
notes, but not specific pitches.
Exercise 1: The Muted Sweep-3rd Finger Bend
Exercise 2: The Muted Sweep—4th Finger Bend
Except for the first measure, which has a 3rd-finger bend, this exercise uses the 4th finger bends after the sweeps.
Exercise 3: Full Chord Sweep
In this exercise, play the whole chord first with all the notes sounding. Play a fast and hard downstroke on
the chord, then damp it and follow it with a 4th-finger slide up to the target note on the 2nd string.