The standard way to pull off a dead note/ mute note is to hold down the string on the fretboard with your left hand without actually pressing down to play the string, yes? Ok, my question is when it comes to slap bass(slap and pop) does the same method HAVE to be applied? According to a friend of mine some people like to mute the string with the back of their palm instead. Which technique is proper? or are both acceptable?