I have 2 audio capable cameras:
SV3C
HD 5MP PoE Camera Outdoor/Indoor 5X Optical Zoom & 2.7-13.5MM
Varifocal Lens Surveillance Home IP Security Two-Way Audio, Superior
Night Vision-Sony Sensor, ONVIF H.265, Support Max 128GB SD Card
SV3C
PTZ
Camera Outdoor POE 5MP with Built-in Microphone for Two Way Audio, SV3C
10 LEDs Super HD Pan Tilt 5X Zoom Security Surveillance Dome IP
Camera(Wired), Support SD Card Recording up to 128gb
The first camera (that I have ) I would want to see the support for is the first one on this list.
I fully understand that you are market driven. I bought these to use with Camect because they are ONVIF cameras, reasonably priced, and full featured.
I volunteer to assist you with any testing and things like tcp dumps during operation.