Orenstein began creating music early in his life and cites his mother’s blues and jazz record collection and Jimi Hendrix as inspirations.
After being involved with multiple rock and R&B bands in the 70s, Orenstein collaborated with singer Molly Johnson in Toronto and they began creating their own music under the moniker Alta Moda.
Alta Moda's first album release was on the Epic label for CBS Records, and had some commercial success.
While still keeping a hand in songwriting and record production, Orenstein began composing for film in 1994, scoring “Steve Di Marco’s Spike of Love”.
Orenstein's musical score is featured in the 2008 release of George A. Romero's Diary of the Dead.