Greg's very first and most recent releases are both improvisations with incredible musicians.  Sticks and Stones, from 1987, is a duo with guitar legend Tim Reynolds, and 2013 Debut CD release by AZUL,John D'earth (trumpet), Brian Caputo (drums) and Greg Howard (Chapman Stick). is all improvised live in the studio. 

This is actual video footage from the recording session:

Now you can get both CDs at one low price...