12, 13) Flaco Jiménez – accordion, vocals (Disc four: 14) Wendy Melvoin – vocals (Disc four: 15) Lisa Coleman – vocals (Disc four: 15) Mike Halby – vocals, instruments (Disc four: 16) Aaron Ballesteros – drums (Disc four: 20) Sheryl Crow – vocals (Disc four: 21) Technical Luis R. Torres – producer (Disc one: 1, 2) Los Lobos – producer (Disc one: 1, 2, 18-25 / Disc two: 7-11, 13-19 / Disc three: 1-11, 16-19 / Disc four: 1-6, 8, 17-20) Steve Berlin – producer (Disc one: 3-7, 10-16 / Disc two: 2-4 / Disc four: 9-11), mixing (Disc three: 18, 19) T-Bone Burnett – producer (Disc one: 4-7, 10-16, 19-25) Larry Hirsch – producer (Disc two: 9-11, 13-17), engineer (Disc one: 15, 18-25 / Disc two: 6-11, 13-17), mixing (Disc one: 15, 18 / Disc two: 9-17) Ry Cooder – producer (Disc one: 17) Mitchell Froom – producer (Disc two: 1, 12 / Disc three: 1-7 / Disc four: 1-5, 17-20) Hal Willner – producer (Disc two: 6) Tchad Blake – producer (Disc four: 1-5, 17-20), engineer (Disc two: 12 / Disc three: 1-7 / Disc four: 1-5, 17-20), mixing (Disc three: 1-7, 11, 17 / Disc four: 18-20) Latin Playboys – producer, engineer, mixing (Disc three: 13, 14 / Disc four: 15) John Chelew – producer (Disc three: 15) Leib Ostrow – producer (Disc three: 16) Eugene Rodriguez – producer (Disc three: 16) Cesar Rosas – producer (Disc four: 12-14, 21), engineer (Disc three: 16, 18, 19 / Disc four: 12-14), mixing (Disc three: 16 / Disc four: 8, 17, 21) Mario Caldato Jr. – producer, engineer, mixing (Disc four: 6) Jim Weider – producer (Disc four: 7) David Hidalgo – producer (Disc four: 16) David Sandoval – associate producer (Disc one: 1, 2) Joe Schiff – associate producer, engineer, mixing (Disc three: 15), assistant engineer (Disc two: 9-11, 13-17) David Hirshland – associate producer (Disc three: 15) Patrick Flynn – engineer (Disc one: 1, 2) Mark Fleisher – engineer, mixing (Disc one: 1, 2) George Johnsen – engineer (Disc one: 3) Mark Linett – engineer (Disc one: 4-14, 16), mixing (Disc one: 4-7), remixing engineer (Disc one: 21) Mark Ettel – engineer, mixing (Disc one: 17) Stephen Shelton – engineer (Disc two: 6), assistant engineer (Disc one: 19-25) Bob Schaper – engineer (Disc two: 1-4 / Disc four: 6), mixing (Disc two: 19 / Disc three: 18)