im am gonna go through step by step on how to slap (wank) a bass and the pop
Step 1: Materials
-at least half a year of playing bass depending on how often you practice, proper technique is very hard to learn
Step 2: Thumb
Curve your thumb as most as possible while in a comfortable and be able to play, this is important for proper technique and will take some time to get used to.
Step 3: Its All in the Wrist
now with your thumb in a cureved posistion rotate at the wrist,as if turning a door knob. it is all in the wrist no thumb movement at all!
Step 4: Wank Away!!!!!
now while holding your bass place your thumb parallel to the strings and above the string and turn your wrist like a door knob. and you should bounce off the string with the knucle of your thumb on top of the fretboard at ur twentyth fret area. when I say bounce I think of when a person hits face first on the ground and there head pops up immediately. this will take awhile to get the whole bouncing off the strings its different but practice, it will take a few months
Step 5: The Wrong Way
Practice good techniqes and they will become habbit. do not point ur thumb down!!
Step 6: The Pop
This is the simple part make a hook with your index finger and put it under the string and pull up making a pop sounds.as a learning exercise slap and pop your octaves. I don't think the pop needs a huge part because it is easy and requires very little skill but if someone can't comprehend it I will go and expand the Instructable.
Comeing Soon!! Double Thump instructable