Talos Security DRSDI1641 HD-SDI DVR Manual - Manual (Page 49)

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▪ RECORD: Select On/Off for audio recording per channel.
5.4.4 EVENT
TIP: If you select the RECORD+ menu all setting you can be changed at once.
5.4.5 AUDIO
▪ PRE RECORD: Select the pre recording time by second. (0 ~ 60 SEC)
▪ POST RECORD: Select the post recording time by second. (0 ~ 100 SEC)