Audio is very clear and intelligible. Am I listening what ProVoice?... Since we can hear both dispatcher and field office, it must not be from an catalog scanner. I assume ProVoice is digital. I never heard ProVoice before. I understand that no scanner can demodulate ProVoice. The only digital voice I've ever heard is from my Uniden 396. Military P25 (WSMR) and Texas DPS (dispatcher only off the Mt. Franklin tower in El Paso some 40 miles from here) from various hot spot in Las Cruces. The Uniden does not sound as great as this live stream.
Yes, your listening to Provoice when an officer or FF speaks. Provoice is digital, and yes, it is very clear. An EDACS radio is providing the audio for the feed.
I just updated my page. I changed the look of the page somewhat and also added a stand alone player. The stand alone player takes up a fraction of the screen.