I've been wondering how to emulate the normally connected effect send/return pair that is found in most pro mixing consoles in a patch that would function something like the diagram below:
The idea being that the signal path proceeds straight from inlet to outlet unless something is inserted to redirect the signal through another patch then back to the insert point and on to the outlet. This would seem to be a straight-forward task if it were possible to detect whether or not a connection exists to a specific inlet or outlet and then reroute the signal accordingly. Is this possible in Pd Vanilla? I've thought of a hack to reroute the original signal based on the presence of a signal at the return, but would prefer to base it on whether or not the connection exists instead.
Basically, I just want to expose interesting insert points in some patches for quick and easy application of discreet effects or processing without having to dig into their guts every time I want to add some reverb, delay, vibrato, or whatever.