Great Brouwer study for speed bursts
 

This Brouwer Estudio is a great exercise of speed bursts with the Piazzolla's influence on the tango rhythm. Brouwer has chosen very cleverly here the five note pattern so that every two finger combination (here played with i-m, i-a with free stroke and rest stroke) has it's reversed version when repeating the pattern.

https://www.youtube.com/watch?v=8o1z...Ghzvr1&index=7