I've been looking at trap/rap tutorials and sometimes the 808s are formed like a bass, where it can even have a bass line, where each has a pitch (note). And other times it's just used like a drum where they don't really talk about its pitch, it just sounds like a heavy kick drum. So which one is it?
Edit: I'm not talking about the actual tr-808 machine. I'm talking about how an 808 sample (or synth that sounds like 808) is used in trap/hip-hop. I'm confused of if it's used as a drum or a bass instrument.