I already showed you how easy it is to send Midi over Wifi on a Mac (see here).
But sending Midi over Ethernet is even easier.
And without doubts faster.
You just need this little piece of software: ipMIDI.
Of you’re on a mac, you’re lucky, because it’s free.
If you’re on windows, it’s worth 79 bucks (I don’t actually know for Unix-like OSes).
After the simple installation, you can tell your application to route midi through an ipMIDI port.
You can also decide how many ports to set up (on mac, go to Audio Midi Setup, double click on ipMIDI).
Here you can see how I set up my Ableton Live set.
Ableton Midi preferences:
My Midi Track: