Curve shape before the specified envelope point in envelope N. Default is 0. 0 is linear, positive values are slower and negative values faster. Past 10 or -10, there’s little difference - at that point, the envelope is practically a horizontal line and a vertical line (if positive) or a vertical line followed by a horizontal line (if negative).
Shapes values can also be applied to “regular” ampeg, pitch and cutoff envelopes.
eg01_shape1=5.2 eg02_shape2=-3.5 ampeg_attack_shape=3.8 ampeg_decay_shape=-1.4