Strum Acoustic's chord library contains basic and extended chords available in open, movable, or drop voicings. Play the chords you know and Strum Acoustic voices them as a guitarist would. Strum Acoustic features nylon- and steel-string guitars of various sizes, prepped in pick- or finger-sounding colors. A versatile collection that covers a wide range of musical styles. Go from nylon to steel, from jumbo to concert, or from country rock to fingerstyle classical.