From the other article linked elsewhere in this thread: "Today, all that remains of the recording session is a 12-inch single-sided acetate disc, cut by the BB

From the other article linked elsewhere in this thread: "Today, all that remains of the recording session is a 12-inch single-sided acetate disc, cut by the BBC's technician while the computer played. The computer itself was scrapped long ago, so the archived recording is our only window on that historic soundscape. What a disappointment it was, therefore, to discover that the pitches were not accurate: the recording gave at best only a rough impression of how the computer sounded."