let me explain my current config, it might help some people strugling with midi loops and thru boxes:
Currently using 2 chains of 2x Emagic AMT8/Unitor (= 2x2x8 midi I/O = 32 midi I/O in total). These are midi interfaces, but can also function as midi patchbays, with some limitations. I use them mainly as patchbay.
All are configured so that every input sends to all outs, except its own.
with some exception for some input devices (midikeyboards and such) and the pyramid itself. it’s quite a complicated puzzle sometimes, so I document and plan in an Excel spreadsheet
one pair of ins and outs for each chain goes to the pyramid, the ins first into a midi switch (philip rees). Not a merger, because with the switch I can easily stop the pyramid from recording whatever someone else in the studio is playing live on the synths without having to dive into the pyramids menu
the pyramid is set to “anti echo” => “on”, so that the input does not go to the outputs (as my Emagic chain is handling that). With other sequencers (alesis mmt8 for instance) this would be called “midi echo” = "off"
currently very happy with this setup, as its more flexible.
also see this topic:
only downside i guess is i can not play synths from “chain 1” with keyboards from “chain 2”, and vice versa, but it would become complicated with the channel overlap anyway. I could do it if I change the pyramid “anti echo” config with one of the auto settings, but just thinking about the repercussions makes my head hurt
still have some other gear I would like to add, e.g. Atari with some synth editor software on it… but in the past I had midi loop issues with that so I’ll wait untill this current config is considered “stable” on its own.