First, Make sure your bass is tuned...The standard tuning for a 4-string bass is E A D G ( E being the thickest string or the top one if you will).
This would be the proper starting position for a slap riff
Slapping consists of 2 steps: The slap(thumb) and the pluck(index or other).
For the slap:
To get the resonating sound you should extend your thumb like so(only in the beggining) and the joint of your thumb should hit the string
To proparly use your thumb you should practice on hitting the E string and making it resonate each time. Like so:
For the pluck:
Your index(or prefered finger) should be placed under the string (but not to much) and will be moved in a upwards direction:)
To practice your pluck place both your third and index finger respectively under the G and D strings and pluck!Like so:
Now put the together!!
That was a short slap lesson! Thanks for watching:) ( and yes i know i do a weired thing with my mouth when i play-_-)
The creator of this guide has not included tools