Passport's 1975 album Cross-Collateral is a high-energy fusion of progressive rock, jazz, and atmospheric electronics, driven by punchy funk rhythms and spacey, vintage synth textures. Led by saxophonist Klaus Doldinger, the sound pivots between complex, multi-part progressive suites and tightly grooving jazz-rock jams. Doldinger’s expressive saxophone work—ranging from soaring, melodic leads to raw, aggressive riffs—interlocks seamlessly with swirling Moog synthesizers, warm Fender Rhodes keys, a driving electric bassline, and crisp, propulsive drumming. The result is a quintessential mid-70s Kraut-fusion record that balances cerebral instrumentation and cosmic soundscapes with accessible, infectious grooves.