Complex sentence: This is often accompanied by the use of an instrument such as a Rickenbacker bass, whose sound contains an unusually large amount of treble frequencies, or a Chapman Stick, which is operated with both hands on the fretboard and allows polyrhythmic and chordal playing.
Split into simpler sentences: This is often accompanied by the use of an instrument such as a Rickenbacker bass, whose sound contains an unusually large amount of treble frequencies. Some bassists use the Chapman Stick, which is operated with both hands on the fretboard and allows polyrhythmic and chordal playing.