I recently replaced an old security camera system I had with an Annke DW81KD DVR with an external microphone attached to the AUDIO IN jack in the back, just I had done on several other older systems. However, when I enable audio on the system, all I can hear on my HDMI monitor is a faint hum. I know the system and my monitor are getting audio because if I stream a camera feed to my phone and enable 2-way audio, I can hear the mic audio on my phone and my phones audio plays on the monitor. But, I can't seem to make either live or pre-recorded mic audio play on the HDMI monitor from the DVR. The manual talks about attaching a speaker to the audio out, but does Annke really not include the audio feed on the HDMI output? I've never seen a system that did that before.
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