Marking 50 years for Chicago's most important and innovative ensembles, formed in 1969 to advance creative musicians as part of the AACM, is this tribute to and based on music written by late members Lester Bowie, Malachi Favors, and Joseph Jarman, performed by 15 innovative musicians young and old, and presented in 2 CDs: one in the studio and one live at the 2018 Edgefest.

Studio recordings of two startlingly impressive compositions for orchestra and improvisers, with four soloists--Mary Halvorson (guitar), Kris Davis (piano), Nate Wooley (trumpet), and Laubrock (saxophone)-- presenting "Vogelfrei" written for the 2014 second Jazz Composers Orchestra Institute Reading, and "Contemporary Chaos Practices" written for the 2017 Moers Festival.

William Parker developed these works presented in three complementary albums titled "Voices Fall From The Sky", "Songs", and "Essence", bringing together new compositions with long unavailable or new versions of previous pieces, performed in various configurations from solo to large ensemble, the songs reflecting freedom, compassion, anti-oppression, anti-violence, a love of nature, spirit and creation; essential elements in Parker's optimistic oeuvre.