The band added keyboardist Mark Naftalin, and its debut album, The Paul Butterfield Blues Band, was finally successfully recorded in mid-1965 and released later that year.
The 13-minute instrumental track "East-West" incorporates Indian raga influences and some of the earliest jazz-fusion and blues rock excursions, with extended solos by Butterfield and guitarists Mike Bloomfield and Elvin Bishop [REF].