Peavey DPM V3 Owner's Manual page 57

Note: Chorus effects can also provide flanging, a "swooping," jet airplane-like
sound, with the proper parameter settings (described later). Also, remember that the
previously-discussed modules offer many signal processing options — delay for one or
more links in a Combi patch, tremolo by modulating a DCA with an LFO, etc.
Important: Some combinations of effects, mostly those involving reverb, are not
available because of the huge amounts of computer processing they would require.
Example: Both Effect 1 could be assigned to Reverb/EQ and Effect 2 to
Delay/Chorus, but Effect 2 could not be set to Reverb/Chorus.
4.1b The Differences Between Effect 1 and Effect 2
If Effect 1 includes a pair of effects (such as Reverb/Chorus), these can be configured
in three different ways: Series, parallel, and dual.
The following figure shows the series connection. The stereo audio outputs feed Effect
T's first stage, which then feeds the second stage. The second stage provides the
master stereo outputs and provides a master level parameter.
Left out
4.2