[2] His 1975 track "Power" married frenetic Led Zeppelin guitars to the impassioned exhortations of a Southern US evangelist years before hip hop discovered the potency of the same (and related) ingredients.
In 1980, Oswald founded the Mystery Tapes Laboratory, which created unnamed, unattributed works on cassette, described on the plunderphonics website as "little boxes of sonifericity specifically formulated for the curious listener.
Available in your choice of aural flavors: subliminal, blasted, excerpted, repeatpeateatattttttedly, these cinemaphonically-concocted aggregates of très different but exquisitely manifest, unprecedentedly varied festerings of audio quality fine magnetic cassette tapes are the best of whatever you've been listening for".
In 1989, Oswald released an expanded version of the Plunderphonics album on compact disc containing twenty-five tracks, each using material from a different artist.
In 1990, notice was given to Oswald by the Canadian Recording Industry Association on behalf of several of their clients (notably Michael Jackson, whose song "Bad" had been cut up, layered, and rearranged as "Dab") that all undistributed copies of Plunderphonics be destroyed under threat of legal action.
"I wasn't selling the disc in the stores, so I let listeners tape it off the radio for free," explains Oswald, who paid for the production and manufacture of the CD out of his own pocket.
Arguably his most ambitious composition to date, it attempted to microsample the history of CD music up to that point (1982–1992) in a 20 minute collage of bewildering complexity.
From 1993 to 1996, Oswald worked on and released Grayfolded, a 2-Disc set commissioned by the Grateful Dead consisting of pieces created from over 100 performances of the song "Dark Star".
The label also rereleased Plexure and released Aparanthesi, a work which uses the single note A in an experiment with timbre, dynamics, and layering, on CD in 2003.