JVC VN-T216U Instructions Manual page 44

Please click the "Save" button to save your settings. You can also
click the left button "Reset to Default" to set all the data and options
Note
as defaults.
When enabled audio output to "ON", there are audio issue of the
sound is disconnected under a few part of Windows 7 environments.
In order to solve audio issue, we suggest to you change a driver
settings as follows.
1. Jumbo Frame
--> Set to "Disable"
2. Large Send Offload (IPv4)
--> Set to "Disable"
Caution
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