Just making a post here cause I've spent months trying to figure it out and someone made a post today that got me really close. So between this link and this post where its just one shell script that can run any message I managed to get my ad 110 amcrest camera working. The biggest issue I had was that after enabling talk in the amcrest app the send audio would work and I could hear it but after closing out the app and ringing the door bell it would no longer.

This was from after ringing the doorbell the audio output would be set to 0. This can be fixed by running curl -XGET --digest -u admin:<password> \ -vvv "http://<camera-ip>/cgi-bin/configManager.cgi?action=setConfig&AudioOutputVolume\[0\]=100"

Just leaving this here for future people since I couldn't find anything related. Also please note running api commands is not recommended and you can brick your camera from the forum posts I have seen.