Peavey DPM V3 Owner's Manual page 32

The DPM V3 arranges its modulation source outputs and modulation destination inputs
into a "matrix" so that virtually any output can feed virtually any input. The OSC, DCA,
FILTER, and PAN modules have two independent inputs that can be assigned to any
modulation source. The LFO has two independent inputs that control modulation
Amplitude (depth), but also has a third input that controls modulation Rate.
There are also some normalled connections where a particular modulation input per-
manently connects to a particular modulation source. The AMPENV module is normall-
ed to Envelope 4 only; the Envelope Generator Time and Level parameters are
normalled to the Velocity and Note Position modulation sources.
Each non-normalled modulation input includes two parameters: modulation source
(including off if no modulation is desired), which lets you choose from the various
modulation sources mentioned above, and modulation amount.
The modulation amount can be positive'or negative. With positive amounts, an increas-
ing control signal increases the value of the parameter being controlled. With negative
amounts, an increasing control signal decreases the value of the parameter being con-
trolled. A setting of 00 is equivalent to turning off the modulation source; conversely,
turning off a modulation source is equivalent to setting the amount to 00.
Note that having two modulation inputs available allows for interaction between two
modulation signals. Example: If a parameter responds to keyboard velocity and an
envelope generator, the parameter will follow the general envelope shape, but be in-
fluenced by the velocity as well.
If a "baseline" setting exists, modulation amounts add or subtract values from that set-
ting. Example: lf a filter cutoff is set to a certain frequency, positive modulation
amounts will increase that frequency, and negative modulation amounts will decrease
that frequency. Note that modulation cannot force a value beyond its maximum range.
In other words, if the filter cutoff is at the lowest possible frequency, then maximum
positive modulation will vary the filter cutoff from the lowest to the highest frequency.
Applying negative modulation will not affect the filter frequency, because if it's at its
lowest value, it cannot go any more negative.
3.4