Waldorf 2-Pole - Manual (Page 25)

2-pole Parameters
25 2-pole Analog Filter User´s Manual
Env Mod
(= Envelope Modulation Amount). This
bipolar control sets the amount and
direction of the envelope modulation
on the cutoff frequency. For positive
settings, the filter cutoff frequency is
increased by the envelope, for negative
settings, the cutoff frequency is decreased. Use this para-
meter to change the timbre of the sound over time.
Sounds with a hard attack usually have a envelope
amount that makes the start phase bright and then closes
the filter to get a darker sustain phase.
Drive
Drive saturates the signal. If turned to
the leftmost setting, no saturation will
be added or, in other words, the signal
will remain clean. The more it is turned
up, the more harmonics will be added
to the signal, resulting in a distorted
character. For your information: the
saturation stage is located behind the filter module within
2-pole´s signal path.
[ Drive is well suited for signals that use some filter
resonance.