The send/return there do the same thing as just running cab into a volume or filer block (mute bypass) where the return block is. That will either boost dry level when you add the effect path, or require one more of those effects to be at 100% mix, which probably isn't desirable in most cases. Posts #4 & #10 here illustrate two ways to avoid those issues.
Took me a minute to figure out what you were saying there, but I got it.
I'm guessing that OP wanted those effects at 100% wet based on the image in the original post. I could be wrong though.
I don't think that's very likely. Consider what would happen when reverb and one or both delays are on. You wouldn't hear any normal delay repeats, just a bunch of reverb that begins later.
Ah yeah. I see. Going back and reading the OP again, he's not wanting to just engage the effects path but to switch to that path.
That works but the routing from @sprint in post #4 does the same thing with two fewer blocks. Filter, mixer or multiplexer blocks can also be used in place of the vol/pans there.
Yeah, there are a few ways to get it done. I'm not trying to compete here, just exploring various solutions.
Using of the Send / Return like this is really cool and not something I'd really thought of doing before (always used it just to get from one line to another) so gonna add this to my toolbox.
There's no need to branch to two shunts in separate rows before the mplex or mixer blocks. Branch from the cab block to both mplex/mixer blocks. Make the control switch toggle between row 2 and any other row in the mplex blocks (oppositely, so only one lets row 2 through at a time). Or assign two opposing row 2 level modifiers in the mixer blocks.
