** 2021 Stock ** Solo is a solo album by American jazz saxophonist Roscoe Mitchell which was recorded in 2003 and released on Mutable Music as a three CD set. Disc one, titled "Tech Ritter and the Megabytes," is the most varied and interesting of the set. Released by itself, it would have a claim as Mitchell's best solo effort ... This CD offers a compelling balance between composition and improvisation, long and short, abstract and melodic. The second disc, titled "Solar Flares," is entirely devoted to the alto saxophone. Here, Mitchell's improvisations follow a jazzier path. The music is warmer, more reflective, and easier to get into. The disc is dominated by Mitchell's rich sound and acrobatic articulation ... The third disc, titled "The Percussion Cage and Music on the Go," is something else entirely. It contains 21 very short tracks, nothing over five minutes. They are for the most part percussion solos, with a handful of sopranino sax pieces interpolated in the middle. ... The music has its moments, but it pales in comparison to what has been exhibited on the first two disc."- François Couture, Allmusic