The first day I purchased this app I was able to turn the mic off. I have not been able to since. Therefore every time I access the app Im blown away by the loud ringing sound of feedback from a mic. It can be very disturbing as you panic to find your volume control to alleviate the noise. The mic default should be set to "Off" and allow the user to initiate the mic by having to switch it on "On" and not vice versa. One star until that is fixed.