Well first off, I believe you'll find that the bass guitar track is actually not a bass guitar. It appears to be a keyboard synthesizer. They could also be a bass guitar that is utilizing a dynamically triggered bit of phasing/flanging adjusted very lightly. But it's really, to me, just a playing style and not necessarily any effect whatsoever. It's called playing technique. But since most of the background track appears to be heavily synthesizer laden I believe it to be just another synthesizer track.

I've heard bass guitar players play their bass guitars so artfully and creatively utilizing no effect whatsoever. And that requires lots of practice, practice, practice to develop a playing technique. It's not a software preset but rather, just uniquely accomplished talent. Nobody becomes a virtuoso by pressing a single button. So that's what professional musicians do.

Regarding the percussion question, it could be neither or both. And that's because virtual synthesizers within software can combine all sorts of samples in whole or in part and they can also be layered together. And you get that by understanding the MIDI-based virtual synthesizers that you have loaded up on your computer. It's just like thinking in terms that Taco Bell ain't really Mexican food but an imitation of Mexican food design for the American palate. You know what real Mexican food is and most Americans don't.

I love those incredibly hot roasted poblano peppers and real hot jalapenos. And since that really hot spicy stuff is actually not acidic, it's alkaline which can cool off a burning mouth with a big slurp of orange juice or lemonade. And that's because acid neutralizes alkaloids. There is just no acid in beer but there is in a margarita. And one of the main ingredients in a margarita is a sour mix based mostly upon lime which neutralizes an alkaloid based burn. Stupid Americans will try and drink milk to soothe a burning mouth from the hot peppers. But milk is also alkaline and it doesn't soothe the burn.

I have to suffer with American emulations of Mexican food. Americans don't know what spicy really means.
Mx. Remy Ann David
(a former visitor to Mexico City, Acapulco, Nogales & Tijuana where I didn't want any tea at all. Along with the great Pyramids. And not the ones from Bernie Madeoff. Along with those other incredible and beautiful historic sites that grace your country. At least I've gotten to sample some of the other lovely greenery that comes from your country and imported into the United States which a lot of Americans like myself, seem to really like. Though it is like burning money.)