Summary: two-way audio doesn't work through web UI or Blue Iris iPhone app.
I have a Hykamic IPC3442 - Hikvision clone DS-2CD2442FWD-IW and can't get two way audio working. Anyone know what fixes this? I'm using Blue Iris as my NVR. I enabled Video and Audio in the Video settings and can hear the camera on my Blue Iris app on iPhone. However, within Internet Explorer when I click the Live View then Two Way Audio then click Two-way Audio Channel 1 I get an error: "Using two-way audio failed".

I've flashed to latest firmware 5.5 53 build 180730 due to the security issue @fenderman posted about.

Any ideas if this is fixable?
I have a Hykamic IPC3442 - Hikvision clone DS-2CD2442FWD-IW and can't get two way audio working. Anyone know what fixes this? I'm using Blue Iris as my NVR. I enabled Video and Audio in the Video settings and can hear the camera on my Blue Iris app on iPhone. However, within Internet Explorer when I click the Live View then Two Way Audio then click Two-way Audio Channel 1 I get an error: "Using two-way audio failed".

I've flashed to latest firmware 5.5 53 build 180730 due to the security issue @fenderman posted about.

Any ideas if this is fixable?