Frank Zappa's liner notes for Freak Out! name-checked an enormous breadth of musical and intellectual influences, and he seemingly attempts to cover them all on the second Mothers of Invention album, Absolutely Free. Leaping from style to style without warning, the album has a freewheeling, almost schizophrenic quality, encompassing everything from complex mutations of "Louie, Louie" to jazz improvisations and quotes from Stravinsky's Petrushka. It's made possible not only by expanded instrumentation, but also Zappa's experiments with tape manipulation and abrupt editing, culminating in an orchestrated mini-rock opera ("Brown Shoes Don't Make It") whose musical style shifts every few lines, often in accordance with the lyrical content…

After a prolific run in the 1970s, Manuel Göttsching's '80s output with Ash Ra Tempel was greatly reduced and the quality of his work was uneven: Belle Alliance flirted with contemporary synth pop with mixed results; E2-E4 proved influential, resonating with subsequent electronic artists; and the cheesy new age travelogue Tropical Heat dabbled in some of the decade's worst sonic clichés. Recorded in 1988, Walkin' the Desert struck a tasteful balance between Göttsching's experimental inclinations and a more mainstream techno sensibility. The album is an edited version of a performance given with Lutz Ulbrich in Berlin for the Desert Sounds event series (part of the Berlin: European Capital of Culture festival)…