To stop the beep sound on a Hikvision DVR, you can follow these general steps. Please note that the menu options and steps may vary slightly depending on the specific model of your DVR:

1. Access the DVR Menu:
   • Connect a monitor to the DVR or access the DVR settings through a web browser or client software.
   • Log in to the DVR using your username and password.
2. Navigate to Alarm Settings:
   • Look for an "Alarm" or "Event" section in the menu.
3. Disable Alarm Beep:
   • Within the Alarm or Event settings, there should be an option related to the beep sound.
   • Look for a setting like "Beep On Alarm" or "Alarm Sound" and set it to "Off" or "Disable."
4. Save and Apply Changes:
   • After making changes, save the settings and apply them.
5. Reboot the DVR (Optional):
   • Sometimes changes may require a system reboot to take effect. You can find a reboot option in the system settings.
6. Check the Manual:
   • Refer to the user manual or documentation provided with your specific Hikvision DVR model. It will have detailed instructions on how to configure various settings, including the alarm beep.

Check out this Youtube Video https://www.youtube.com/watch?v=ERgY-GHWwRk