MIDI to OSC

This simple Python script converts MIDI input to OSC, specifically intended to work with VRChat.

Mido and python-osc (and Python) are required. You can install them easily by running the two commands below in your terminal (if you have pip installed). pip install mido pip install python-osc

If you haven't already, check out my guide on how to set up a MIDI visualiser in your avatar here.

How to Use

Using this program is quite straightforward:

• Run midi_to_osc.py,
• Look at the list of MIDI inputs (which looks like ['USB-MIDI 0'] in my case) and input exactly as shown the name of the one you wish to listen to, including the number at the end (in my case USB-MIDI 0).

That's it!

How does it work?

This script basically listens to the MIDI input you give it and when it detects a message, either "note_on" or "note_off", it sends a signal, either True or False to a specific URI for the note it just detected. Yes, this means every note has a different URI. The only reason I adopted this method was to achieve complete independence of every key on my VRChat piano visualiser. Currently the URI is structured like this: /avatar/parameters/KeyXXX, where XXX represents a two- or three-digit number (without any leading zeros) which corresponds to the MIDI note number. This signal is then handled further by the avatar.