OK, from memory, it comes from the Bob Clearmountain Percussion & Bass Library, (a 5 string Music Man bass) specifically, the D.I. samples but only 5 of the available set; F1, C2, F2, C3 & F3. They were sampled into an Akai S950, and at the time, I was using Steinberg's Cubase on an Atari Falcon...