If you run 14 MIDI devices through one MIDI Port using MIDI Thru Boxes you get a worse timing compared to using a multiple Output Interfaces like the Steinberg Midex 8 oder the Midiman Midisport 8x8. But I don't know if there is a 8x8 Interface with Linux drivers. All of them implement a feature to reduce latency and I think that's a problem for the driver developers because the companies don't want to show the specifications for that in public. Regards, Joachim PS: I added the Linux-Audio-User group to the cc because this is linux specific question.