If people are trying to figure out 2-way audio on blue iris, I think I found the answer in this video's comments -
1. Go to camera properties
2. Go to the video tab and select configure
3. Change the Make to HikVision and the model to DS-2CDxxxRTSP
4. Change the path to /h264/ch01/main/av_stream
5. RTSP Port should be 554 and ONVIF Port should be 80
Boy oh boy, I just cant figure this out. I followed these directions exactly, yet I can get BI on my Samsung S10 5G phone to work. I can hear anyone at the front door great, but when I try to talk to them, nothing comes out. The RCA Security android app works great with 2 way communication. My Foscam cameras work perfectly with 2 way communication. Im thinking I am missing something basic? Im using 15 FPS. I also watched this video: Loudspeaker volume is at 10. Microphone at 10. HSDB1 model. Device version 1.4.62 build 171127 (No newer version avaialble). Do I have to port forward something? I woudlnt think so since the RCA app works 2 way. I also tried ONVIF port 8999. Any other tabs in BI I need to change?