All 10 of the etudes were written to fit on a low A marimba. Both parts can be played simultaneously on the same instrument. The book is versatile and can be used in many ways. Take a few of the etudes and perform them on a recital as a suite. An intermediate student and a teacher could work through all 10 etudes in order. Each etude has a unique sound and style making the collection enjoyable to play and listen to. Any etude can also be arranged for different combinations of mallet instruments. For an example of this, check out the video featuring vibraphone and Pearl malletSTATION on this page.