Using Nanokontrol2 Korg's

Hi! Can you help me, please?
How to use Nanokontrol2 in Audacity?

You cannot do this. Audacity does not work with these DAW controllers, nor does it do USB-Midi. From the Korg site: Specifications | nanoKONTROL2 - SLIM-LINE USB CONTROLLER | KORG (USA),
it appears to be compatible with Avid Pro Tools, Apple Logic, Apple GarageBand, MOTU Digital Performer, Steinberg Cubase, Ableton Live, and Cakewalk SONAR.

If you are looking for a mixer-style control for Audacity, try View > Mixer.

While that is true, there’s possibly a (rather complicated) workaround, which is to use a 3rd party app to translate MIDI controller messages into simulated key presses. Much of Audacity accessible from keyboard commands. An app that may be able to do this is:
Bome MIDI Translator. (Disclaimer: I’m guessing as I’ve never used Bome MIDI Translator)

Thank you very much for the information and suggestion, I will work :nerd: Thanks