Steve Vai – guitar, Eventide H3000, keyboard (tracks 1, 3, 5, 7, 11), bass (tracks 1, 8, 9, 11), arrangement, engineering, production David Rosenthal – keyboard (tracks 2, 9, 13), background vocals Pia Maiocco (credited as Pia Vai) – keyboard on one chord (track 4) Bob Harris – keyboard (track 10), background vocals Chris Frazier – drums (tracks 1–5, 8, 10, 11, 13) Tris Imboden – drums (tracks 7, 9) Stuart Hamm – bass (tracks 2–5, 7, 10, 13) Nancy Fagen – "vocals & hysteria" (track 8) Jamie Firlotte – boy vocals (track 8) David Coverdale – background vocals Rudy Sarzo – background vocals Adrian Vandenberg – background vocals Pascal Fillet – background vocals Laurel Fishman – background vocals Lillian Vai – background vocals Pam Vai – background vocals Joel Kaith – background vocals Corky Tanassy – background vocals Jamie Kornberg – background vocals Lauren Kornberg – background vocals Corinne Larue – background vocals Famin' – background vocals Darla Albright – background vocals Laura Gross – background vocals Rupert Henry – background vocals Suzanna Harris – background vocals Julian Angel Vai – background vocals Pascal Fillet – mixing Bernie Grundman – mastering Charts Weekly charts Certifications References External links Steve Vai "Passion And Warfare" at Guitar Nine Steve Vai albums 1990 albums Relativity Records albums Epic Records albums Progressive metal albums by American artists