Quarantine fun, I transformed my Akai Apc Mini into a Vu-Meter.
It works just by plugging some audio CHOP as input and midiout CHOP as output. Tox available for free at www.deltacut.it/touchdesigner/
This is built for the Akai APC mini controller, but you can easily customize it for any other similar midi device, you just need to route the right values to the right channels inside the tox.