hmm well since no one mentioned the 808 kick specifically beforehand, and the fact its comprised of a sine wave (which i knew, not that it matters), then i stand by my comment... it is my opinion that a true bassline is best harvested from a synth rather than a treated kick drum, the flexibility with a kick as a bassline is somewhat limited anyway, and the methods described here will leave Ross with that classic off "oompah" off beat bassline which is more than tried and tested i think

my ultimate advice tho is just see what works best for u, get a few synths, get a few kicks, try both ways, and bobs ur uncle