The Magic mode doesn't work, what is the problem?

You may have not given Metronaut permission to access your microphone, in which case the App can't listen to you and adapt the accompaniment tempo.

Make sure that you have allowed Metronaut to access your microphone in your device settings. Just go to your device settings, then select "Metronaut" and you can enable the access to the microphone.

Also of interest: Magic mode is having trouble adapting to my speed, what can I do?