"Improvisation," the 2007 collaborative effort from guitar virtuoso Henry Kaiser and multi-instrumentalist John Oswald, is a captivating journey into the realms of avant-garde, free jazz, and art rock. Released on January 1, 2007, via Music Gallery/Incus/There Records, this 59-minute album is a testament to the improvisational prowess of its creators. The five-track album, featuring pieces like "Pre-Vou," "Vancouver," and the sprawling "Vancouververiffication," showcases the dynamic interplay between Kaiser's innovative guitar work and Oswald's eclectic sonic contributions. Kaiser, a prolific figure in the San Francisco Bay Area music scene, brings his signature style of free improvisation, honed during the '70s, to the forefront. This album is a must-experience for fans of experimental music, offering a rich tapestry of sounds that push the boundaries of conventional genres. The collaborative spirit and improvisational genius of Kaiser and Oswald make "Improvisation" a standout release in the world of avant-garde music.