Music is just technique – etude for Marimba: This works interval changes in both hands from 3rds to 10ths.

The Right Way to Perfect Control: Double lateral/narrow interval etude.

John – Watch your left hand! – etude for Marimba: This etude uses 4 over 3 polyrhythms and interval changes from 4ths to 10ths.

Anton Bruckner with 4 Mallets: Independent roll study that overlaps between the hands.