Since the wrist motion is at an angle,
the SOUND and FEEL differences are due to
how much pick is touching the string, and
at what angle the edge of the pick is
"scratching" the string.
The 3rd (FORWARD) angle is
greatly suited for ROCK playing and, when
a bit of the thumb touches the string
at the same time as you pick, you can
get those SCREECHING HARMONICS,
when using OVERDRIVE or DISTORTION!
Start at a tempo of about 60 (1 beat/sec)
with a SIX NOTE CHORD- this will help keep
your wrist loose. SLOWLY and SOFTLY at first(1),
then build up the volume(2). Now INCREASE the
SPEED(3) and finally, DECREASE the VOLUME(4).
Try spending between 5 to 10 seconds going
from one dynamic level to the next.
After warming up with 6-note chords, decrease
the number of strings played from 5 down to 1.