The audio from my parrot test on one hotspot sounded a little off. The BER was 0.2% so pretty good but I noticed the NET packet loss was in red at 22%. Yikes!. Luckily I found KD8DR's amateur radio blog and a quick solution. In the Pi-Star "expert" settings menu: Go to "MMDVMHost" Scroll down to a setting called "jitter" and set that to 700 (my original setting was 360). All fixed!