Complex sentence: The core engine technology and much of the user interface was designed by and licensed from a small San Francisco company called OSC, known at the time for creating the first software-based digital multi-track recorder, called DECK, in 1990.
Split into simpler sentences: The core engine technology and much of the user interface was designed by and licensed from a small San Francisco company called OSC. OSC was known at the time for creating the first software-based digital multi-track recorder, called DECK, in 1990.