Mary Halvorson's debut album "On and Off," released on July 23, 2007, under Skirl Records, is a captivating exploration of free jazz and avant-garde sounds. Clocking in at just under 40 minutes, this concise yet impactful collection showcases Halvorson's innovative guitar work and her ability to push the boundaries of traditional jazz. The album features ten tracks, each offering a unique blend of improvisation and composition, with titles like "Crawling," "The Clouds," and "Revo-Lover" hinting at the eclectic nature of the music within. Halvorson's distinctive style and fearless approach to genre-blending make "On and Off" a standout release in the world of contemporary jazz.