LinPlug Spectral - Manual (Page 26)

Note: Even if you choose Out (output) as a routing, still the Master EQ (and
an invisible Limiter) will affect the signal. The Master EQ is described at the
end of the Effects chapter (page 73).
Effects Routing
Just as we talk about the Filter to effects units its maybe a good
point to talk about routing a bit more: Generally you can run all 6
effects units sequentially, but maybe sometimes you may want to run
some in parallel.
Here are some ideas:
Oscillator / Filter 1 could go to Fx1, which goes to Fx2 which goes to
for example Fx 5. Oscillator / Filter could go to Fx 3, which goes to
Fx4 which also goes to Fx5. This way you created two parallel audio
streams which merge in Fx unit 5.
Or you could give each Oscillator / Filter its own Fx unit and they all
merge in Fx unit 5.
Also sometimes interesting is to send one Oscillator / Filter directly
to the output while another one is going through an Fx chain.