I feel bad I haven't tested this in recent upgrades, but I have an AirLink 101 777w. I had attached an external speaker to the AirLink camera and I not only could hear Audio but could transmit audio from my iPhone to the camera. The external speaker runs off a single AA battery, so it often goes dead pretty quick. I had used it for entertainment purposes only. The battery in it has been dead for awhile and tonight I replaced it to show some friends, but to my dismay it no longer works. I set this up soon after you provided support for audio on the AirLink cameras. Has something changed? I did check my settings and my camera is set to enable audio.
Merlin