_derivations is a semi-autonomous software system designed to take part in live improvised encounters with instrumental musicians. The system was developed by Sydney-based saxophonist/composer/technologist Ben Carey. _derivations listens to the performance of its collaborators, using this information to make decisions about its own contribution to the unfolding musical dialogue. The resulting interactions are often abstract, intricate and playful, and showcase the unique possibilities afforded by placing both human and machine on an equal footing in performance. The six tracks collected here were each recorded in a single-take during improvisations with the software over the period 2011-2013. Performers: Alana Blackburn - tenor recorder Evan Dorrian - drums Joshua Hyde - alto saxophone Antoine Läng - voice Ben Carey - soprano and tenor saxophones Mastering: Jos Smolders | Earlabs Studios, Tilburg, The Netherlands Artwork: Zoé Nelson | Graphic Design: Holly Philip