Sequential Prophet VS - ENVELOPE AMOUNT FOR FILTER

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(If under these conditions the dierence between input and lter frequency
becomes very large, low-frequency beating may occur which may be useful or
merely obnoxious.)
A slightly technical note on lter resonance. Refer to Figure 7-1. As the input
signal frequency approaches cuto frequency, phase shift of the lter output
approaches 180 degrees (inversion). The resonance feedback amplier is an
inverter. Therefore these two inversions result in a net phase match at the
cuto frequency (which becomes the resonant frequency), due to the positive
feedback. These frequencies are boosted, while frequencies farther below
cuto are attenuated due to the net negative feedback which they receive.
ENVELOPE AMOUNT
As shown on Figure 7-1, this parameter sets the amount of lter envelope
which is allowed to modulate the cuto.
To adjust envelope amount, press Env Amount and use the slider (00- 99).
Env Amount has crucial control over the lter modulation of each program. It
sets the maximum positive or negative depth of “contour” modulation applied
by the envelope generator to the lter cuto. It is very important for balancing
the eect of the envelope against the Cuto parameter. When Env Amount is
set to 0, there is no envelope. In this case, cuto control primarily results from
the cuto, keyboard modulation source amount, and velocity.
As the envelope amount is adjusted towards either extreme, the timbre of the
note depends increasingly on the lter envelope, most notably at low cuto
settings. When Env Amount is set positively, the cuto frequency never goes
below the Cuto level. When set negatively, the cuto frequency never goes
above the Cuto level. To generate more noticeable frequency sweeps when
Env Amount is increased toward +99, Cuto is usually decreased.
(To more clearly hear the eect of a lter sweep, temporarily increase the
resonance to the point where you can more distinctly hear the changes in the
resonant pitch.)
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