I can't slap, I never learned. I never learned because I don't like it at all, dunno why, I just don't enjoy all the sound that's produced. I'm old school. I learned using just my thumb in the late '60's, then graduated to include picking in the '70's, then onto include single and multiple fingering techniques after that. I've never played in a band that required a slapping technique, so other than that I just use whatever technique the song requires or sounds best with.