To record audio with the video stream for Bosch VRM units in Security Center, you must enable audio recording on the unit using the Bosch VRM Configurator.
Make sure that the audio source is connected to the LineIn connector on the video
unit.
You cannot play back the audio of Bosch VRM video recordings or exported video files in
Security Center.
If the unit is already added in Security Center
and is recording, then restart the unit.