I've had a Google Voice account since its beginning; I had a Grand Central account before Google bought it. I make calls rarely, every few months. I wanted to make one yesterday, but couldn't get audio to work. When I used the 'audio settings' the indicator responded to my speech; neither test for ringing or speakers made a noise. I could record a greeting and listen to a greeting which, one would think, would use the same facilities. All other audio apps worked. I called a friend, who didn't hear me nor did I hear him. I tried openphone.com, which recorded and played back properly. After futzing with it for a day I tried Opera, which worked. I have 2 different sets of audio hardware; both didn't work in Google Voice in Firefox (but worked elsewhere). voice.google.com had permissions in Firefox. I've done all the troubleshooting at google.com and asked on their forum (no response.) I read every page DDG returned, found nothing applicable.