Jaycar Electronics QC3624 Installation And Operating Instructions Manual page 31

Channel Disable / Enable Select
During playback, all four channels can playback at once, including audio. For privacy concern, user
can select specific channel(s) for playback, with or without audio.
Select Audio to playback audio from channel 1 or 2 or 3 or 4
Select 1 to playback video image from channel 1
Select 2 to playback video image from channel 2
Select 3 to playback video image from channel 3
Select 4 to playback video image from channel 4
When more then one channel selected for playback, system will display playback screen in QUAD
format.
Audio is only synchronized to the video channel triggered by motion.
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