Just came across this whilst looking for something else:
https://community.vcvrack.com/t/rack-development-blog/5864/54
Added fix suggested by @stoermelder to allow plugins to register their own audio/MIDI drivers. For example, it will be possible to create a plugin that installs an audio driver that communicates with an Arduino over a serial connection and exposes CV as a 1000 Hz audio interface. You will then be able to select the “My Custom Arduino Protocol” driver in VCV Audio, and it will handle resampling as needed. Or, register a MIDI device that converts MIDI CC messages to/from your custom Arduino protocol. I’m sure there are many ideas the plugin developer community can invent with this API.
