If you are experiencing some issues when testing your microphone when using Google Chrome, this is very likely related to your permission settings.
In some cases you will see an image of a camera with an X through in your URL bar, as seen below, but this is not always the case. The best way to find out is to adjust your Audio and Camera permissions in Google Chrome.
Allowing Audio and Camera permissions in Google Chrome:
You should now be all set for recording your interview. Should you still have problems just get in touch with Sonru Support.
Best of luck!