Seems MOTU used to do some multi I/O midi interfaces for Serial and Parallel (although seems maybe with Mac only drivers) but I can only see the USB versions on their site now…
Would it be worth experimenting with a PCI USB card, so you’re not on the normal USB bus and relying on the motherboard chipset driver? Then attaching one of the MOTU devices to that? Again probably not something you have easy access too without splashing out and possibly having to rely on Returns Policy.
I used to have a hdsp rme card, adn a firewire ff800, and no, the midi was not tight with those for some reason, i think the drivers were the old style non time stamped and it sucked in cubase big time.
Problem is i love windows 7 64, never want to use xp again, and no serial port midi has drivers for windows 7 64, not even after all this time now. So.
Well I’m stumped and think you’ll just have to go with daisy chaining (unless you want to try the PCI USB route and find you are lucky with it but I wouldn’t hold my breathe.)
Sure I’ve read it’s more about added latency down the chain than jitter though. So thing recommended is stuff like having drum machines and anything with a fast attach as early in the chain as possible, you pads and low attack sound coming from devices further down the chain. Then when you render the final pieces to the computer you can have only one device attaches at a time if you so desire.
Good luck, shame it doesn’t appear there is a real result in any of this.