To go from fast sweeping to tapping, or any fast playing to tapping, you should use your middle finger to tap (assuming you use only your thumb and index to hold the pick.) I haven't been able to get sweep taps down, but going from fast scales to tapping is pretty simple once you get the hang of using your middle finger (aka build a callus.)
"During this line, the kid acted like he was pushing buttons on a calculator in the air. The kid played ******* air-calculator!"
Myspace
Myspace
