#1
how can I play the rasguedo technique with the three fingers a-m-i?I want it to make a good sound.thanks!(Invalid img)
#3
In this order, c a m i fingers flick out from the palm and strike the strings in quick and even succession.
#4
Why only three fingers? I was taught to do the technique with 4.

If you already know the concept of the technique, but still can't get it down, you could try doing the following. Put a piece of paper over your guitar strings, and practice the technique. You want to hear something like 4 (or 3) rubber bands just hit the paper in very even timing.