Cathedral from Doppler by Bobby Previte/Mark Helias
Mark Helias is a renowned bassist, composer and producer who has performed throughout the world for more than four decades with some of the most important and innovative musicians in Jazz and Improvised Music including Don Cherry, Edward Blackwell, Anthony Davis, Dewey Redman, Anthony Braxton, Abbey Lincoln, Cecil Taylor, and Uri Caine.
Sixteen albums of his music have been released since 1984.