Viewtron surveillance DVRs support recording audio from surveillance microphones. Most Viewtron CCTV DVRs
support 4 audio inputs and have an RCA audio output. Users can associate each microphone to one or more camera views so that when an administrator is in single camera view of a camera, audio can be enabled. Live audio surveillance can be heard on the DVR unit (when speakers are connected). In addition, live remote Internet audio surveillance
and remote recorded audio playback is supported from the web browser DVR viewer application for Mac and Windows PCs. Users can watch live video and listen to live audio right from a web browser such as Firefox. The instructions below explain how to setup the microphones for audio recording on the Viewtron DVR as well as setup remote live and recorded audio playback
. Video is synchronized with the audio and DVR administrators can setup the camera(s) that up to four audio mics are related (play together when viewing a single camera live or during playback).
Once a microphone is connected and the Viewtron DVR is setup for remote access, users can access the DVR remotely over the Internet from a web browser to both see their cameras live and hear the audio live. Below is a screenshot that was taken from a Mac PC accessing a Viewtron remotely via the Firefox web browser. Users can enable audio and adjust the volume using the controls noted in the upper right. Users must be in single camera view to enable audio.
Users can listen to recorded audio when playing back video from the web browser DVR viewer. Users can enable audio in Search & Playback mode the same way as described above for live audio.
Recommended Audio Surveillance Mic
CCTV Camera Pros recommend the MIC-CCTV-02 surveillance microphone
for use with Viewtron DVRs. This microphone is stand-alone, which means that it uses its own coaxial cable and power supply. This lets users position the mic anywhere they choose (not necessarily right on the vicinity of the camera that it will be related to). This gives installers a lot of flexibility.