If you caught our eurorack introduction and have the bug to start embarking on your own system, then you’re in the right place. If you didn’t, I do highly recommend reading it, as some of the terminology in this will be more properly explained in the first part.
Parallel processing is a technique for mixing an effected version of a track with a dry version. This is particularly helpful when you want to process a sound but the plug-in doesn’t have a dry/wet knob or you want to be able to control the effected signal with additional effects, such as EQ, reverb etc.