Psychopy unable to find microphone hardware

I’m running an experiment which does not require a microphone, but after starting the experiment, I get the error message:
“pyo version 0.8.0 (uses single precision)
10.6012 WARNING psychopy.sound.initPyo could not find microphone hardware; recording not available.”

How can I let PsychoPy know that not finding a microphone is ok?

The same experiment runs on my Mac without any problem.
I want to test the experiment on a windows machine, because this is what my partner will be using for the experiment.

I’m running PsychoPy v1. 84. 2 on a Dell Optiplex 990.
Thanks for any help.

It’s a warning, not an error. Just ignore it if it isn’t relevant to you.